Emergent BioSolutions Inc (EBS) Q1 2019 Earnings Call Transcript

EBS earnings call for the period ending March 31, 2019.

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Emergent BioSolutions Inc  (NYSE:EBS)
Q1 2019 Earnings Call
May. 02, 2019, 5:00 p.m. ET

Contents:

  • Prepared Remarks
  • Questions and Answers
  • Call Participants

Prepared Remarks:

Operator

Good day, ladies and gentlemen, and welcome to the Emergent BioSolutions, Inc. First Quarter 2019 Earnings Conference Call. At this time, all participants are in a listen-only mode. Later, we will conduct the question-and-answer session and instructions will follow at that time. (Operator Instructions)

I would now like to turn the call over to the company. Please go ahead.

Bob Burrows -- Vice President of Investor Relations

Thank you. Skailer and good afternoon, everyone. My name is Bob Burrows Vice President of Investor Relations for Emergent. Thank you for joining us today as we discuss the operational and financial results for the first quarter of 2019. As is customary, today's call is open to all participants and in addition, the call is being recorded and is copyrighted by Emergent BioSolutions. Participating on the call with prepared comments will be Bob Kramer, President and Chief Executive Officer; and Rich Lindahl, Chief Financial Officer. Other members of the senior team are present and available during the Q&A session that will follow our prepared comments. Before beginning, I will remind everyone that during today's call either on our prepared comments, or the Q&A session management may make projections and other forward-looking statements related to our business, future events or prospects or future performance. These forward-looking statements are based on our current intentions, beliefs, and regarding future events. We cannot guarantee that any forward-looking statement made will be accurate. Investors should realize that if underlying assumptions prove inaccurate or unknown risks or uncertainties materialize, actual results could differ materially from our expectations. Any forward-looking statement speaks only as of the date of this conference call, and except as required by law, we do not undertake to update any forward-looking statement to reflect new information, events or circumstances.

Investors should consider this cautionary statement as well as risk factors identified in our periodic reports filed with the SEC, when evaluating our forward-looking statements. During our prepared comments as well as during the Q&A session, we may also refer to certain non-GAAP financial measures, that involve adjustments to GAAP figures.

In order to provide, greater transparency regarding Emergent's operating performance, please refer to the tables found in today's press release regarding our use of adjusted net income or loss, EBITDA and adjusted EBITDA, and the reconciliations between our GAAP financial measures, and these non-GAAP financial measures.

For the benefit of those who may be listening to the replay of the webcast, this call was held and recorded on May 2, 2019. Since then Emergent may have made announcements related to topics discussed during today's call. You are once again encouraged to refer to our most recent press releases, and SEC filings, all of which may be found on the Investors homepage of our website.

And with that introduction, I would now like to turn the call over to Bob Kramer, Emergent BioSolutions' President, and CEO. Bob?

Robert G. Kramer -- President and Chief Operating Officer

Thank you, Rob. And good afternoon and thank you for all joining us on the call this afternoon. In my prepared remarks, I'll provide a brief overview of our financial performance for the quarter, and then touch upon certain operational accomplishments, but the majority of my comments this afternoon will focus on four areas of near-term focus for the company.

These include, first, the state of our anthrax vaccine business, namely BioThrax and AV7909. Second, the status of our smallpox vaccine contract negotiations with the U.S. government. Third, the state of our NARCAN Nasal Spray business. And finally, key development programs, including details on certain projects we acquired from Adapt Pharma.

First, a word on our financial performance. Our first quarter financial results were in line with our expectations and reflect the impact of the forward near-term focus areas I just described. Importantly, we're in the early stages of transitioning our anthrax vaccine business in coordination with the United States government.

The United States government has initiated the slowdown of procurement of BioThrax, at the same time signaled its intent to procure AV7909, which we've been developing as the next-generation anthrax vaccine.

Meanwhile, we're also transitioning to two new contracts for our smallpox franchise. The financial implications of the anthrax, and smallpox transitions with the U.S. government is that our financial results for 2019, namely revenue and more significantly profitability, will be heavily weighted to the second half of the year. Importantly, we remain confident in achieving our full year financial forecast as well as operational objectives. Rich, will talk to these in greater detail in a moment. With that let me turn to the BioThrax AV7909 transition. As you know, the United States government has a goal to protect $25 million U.S. lives from the threat of anthrax. BioThrax has been procured by the Strategic National Stockpile for that purpose.

As the only provider of an FDA approved anthrax vaccine, we've also been working for several years in partnership with the US government and developing a next-generation anthrax vaccine, AV7909 which offers the benefits of a shorter dosing regimen and rapid immune response, making it well suited for the general population, under a post exposure scenario. We've been pleased to advance this program into a Phase III clinical trial this year and under our 2016 contract with BARDA, we expect that they will begin procuring AV7909 for the stockpile later this year.

We initiated manufacturing of AV7909 in March of this year and are actively preparing to deliver doses to the SNS under the base contract. We also expect to be in a position to be able to fulfill exercises or options under our existing contract, as early as this year. During the first quarter, we continued to deliver BioThrax into the SNS, under the existing contract and we've also initiate shipments to two new international customers. While the U.S. government is looking to mainly stockpile AV7909 moving forward, we expect that they will also procure BioThrax to support pre-exposure immunization programs, such as the U.S. Department of Defense's long-standing practice to immunize personnel going into high threat theaters, prior to deployment.

We will also continue to produce BioThrax to fulfill the needs of international customers. Before we move to the next subject, let me pause here and take a moment to address the use of the AV7909 moniker. Recently we were informed by the FDA, that our application for the product name NuThrax was not approved. Therefore, we have returned to using its technical name AV7909 while we pursue an alternative brand name. Turning to our smallpox preparedness franchise, let me first speak to ACAM2000. We completed the deliveries of this product to the Strategic National Stockpile, under the previous contract. And as of today are in active negotiations with the U.S. government regarding a new multi-year procurement contract. As we mentioned on our quarterly call in February, we continue to anticipate that deliveries will commence under a new contract in the second half of this year. As a reminder, the U.S. government issued an RFP in August of 2018 for the future procurement of ACAM2000. We then responded and there have been multiple exchanges of requests and responses by both parties over the last nine months. Throughout the entire negotiation process a consistent theme has been that the government remains committed to building and maintaining a stockpile of sufficient smallpox vaccine to protect every citizen in the United States.

We look forward to concluding these negotiations and expect to resume delivery of this critical countermeasure into the stockpile during the second half of this year. Similarly, we are also in parallel negotiations with the U.S. government on a new multi-year contract for the delivery of doses of VIGIV and to the stockpile. VIG is the therapeutic given in support of ACAM2000 and stockpile alongside the vaccine. We expect to conclude these negotiations and deliver VIG to the United States government in the second half of this year as well.

Next, I'd like to talk about the opioid crisis and particularly the role of NARCAN nasal spray and helping curve the devastating impact of opioid overdoses, in doing so, I offer the following framework. Current estimates show that there are approximately 34 million Americans who are at an elevated risk of an opioid overdose, according to CDC guidelines, it's roughly 10% of our country's population. This patient population falls into two distinct groups. First, the opioid prescription patient group accounting for roughly 22 million Americans and secondly, individuals living with an illicit opioid use disorder, which accounts for the remaining 12 million patients.

In contrast to the 22 million Americans who have filled a prescription for an opioid less than 5% of these individuals have filled a prescription for naloxone (ph) product and unfortunately 150 persons from these two patient groups die every day due to an opioid related over dose. Arguably, this is the number one public health threat of our time. Through our acquisition of NARCAN Nasal Spray last year we jumped into this crisis and it double down on the principles and practices of the former owners. These include, first, increasing the awareness of the magnitude of the patient groups impacted by opioids namely this 34 million patient group. Secondly, increasing the awareness around the importance and need for readily available naloxone products like NARCAN Nasal Spray. Third, driving increased access to NARCAN Nasal Spray across all available markets including the retail market, which is comprised of national and regional pharmacy chains as well as independent pharmacies. And secondly, the public interest market, which includes police, fire, EMS, state and local public health organizations and local community-based organizations, as well as through our donation programs to libraries, YMCAs, colleges, and high schools. Fourth, increasing access by working with insurance providers to expand coverage and reduce if not eliminate co-pays and finally improving affordability by maintaining the same responsible approach to pricing first adopted when the product was launched in February of 2016 which includes a 40% discount to the public interest market. We believe NARCAN Nasal Spray is making a significant difference. Clearly, we have more work to do, but we remain confident in our ability to meaningfully reduce deaths caused by opioid overdose. We are encouraged by the following dynamics of the naloxone market.

First, the surgeon general's focused on the crisis and the role NARCAN Nasal Spray can play in reversing the effects of an overdose caused by opioids. Second, other interactions with officials at the federal, state and local government level and their related commitment to education, awareness, and procurement. Third, the growing number of states that have now adapted co-prescription legislation encouraging and in some cases requiring physicians to have appropriate conversations with prescription opioid patients regarding the risks of opioids and the benefits of timely access to products like NARCAN Nasal Spray. All evidence we see from the adoption of co-prescription legislation points to a positive outcome for patients. We continue to strongly believe that further adoption of co-prescription legislation at the state and importantly the federal level would further result in significant patient benefit. And fourth, our interactions with insurers to increase coverage and lower co-pays, which have resulted in a majority of covered patients being able to obtain our product for less than $20 and in many cases with zero co-pay. In addition to our commitments to further leverage the benefits of NARCAN Nasal Spray to combat the opioid crisis. We are currently investing in new delivery and treatment options for opioid emergency response and opioid use disorder. More specifically, we have multiple advanced stage development programs under way that complement our current offering.

The first program is a data-driven initiative to extend the shelf life of NARCAN Nasal Spray , which should drive additional value for patients. The second program is a higher dose naloxone using a ready-to-use, pre-filled syringe for medical personnel, which we plan to submit to the FDA later this year. This will address the dual needs of rapid administration and additional doses when required by EMT's and emergency clinicians. And third is a nasal spray device capable of delivering multiple 4 milligram doses of naloxone from a single device.

These are just a sample of the product innovations that we're continuing to invest and offering opportunities to extend and expand the number of solutions to address the opioid crisis and build upon the incredible impact of the NARCAN Nasal Spray product.

Now I'd like to discuss our two leading clinical development programs. First, on April 16th, we announced positive results from our interim analysis of our Phase II study evaluating a series of dosing regimens for chikungunya virus VLP vaccine candidate. The data show with a single dose administered up to 98% of study participants produced an immune response to protect against the virus by day 7. With persistent effect through the six-month visit, including the one dose regimen we are highly encouraged by these interim data and what the potential could be in terms of impact on addressing the disease. We look forward to completing the analysis and finalizing our development plan, which could allow for initiation of a pivotal trial next year. As a reminder, chikungunya has been added to the CDC's tropical disease list of priority review voucher eligible disease indications.

Secondly, we are ramping up our patient enrollment of the Phase II trial for our FLU-IGIV therapeutic for severe illness caused by influenza A infection in hospitalized patients. We anticipate data from this trial at the end of the year and continue to evaluate options for next steps. In summary, we're successfully executing against our operational plans for 2019, including navigating through two key, U.S. government transitions for our anthrax and smallpox vaccines. The results of the first quarter demonstrate the progress we're achieving toward our operating goals. As such, we're confident that we will achieve our financial guidance for 2019. Looking beyond this current year, we're actively working on our new five-year strategic plan covering the period of 2020 through 2024, and currently expect to share details with investors later this year.

That concludes my prepared remarks, and I now would like to turn the call over to Rich. Rich?

Richard S. Lindahl -- Executive Vice President, Chief Financial Officer & Treasurer

Thank you, Bob. Good afternoon, everyone, and thank you for joining the call. For my prepared comments today, I will walk through the first quarter performance across the P&L, then shift to the balance sheet, and address the state of our capital structure, and wrap up with comments on our forecast for 2019, as well in the second quarter.

As a reminder, we provided all the numbers related to our first quarter results, as well as the requisite reconciliation tables in the press release we issued this afternoon. Therefore, my goal today is to focus only on the highlights.

Results for the first quarter of 2019 reflects both continued execution against our financial and operational goals, as well as the ongoing diversification of our business. Total revenues were $191 million, a 62% increase. Adjusted net loss was $6.8 million, lower versus prior-year, and adjusted EBITDA was $7.4 million, an increase of $4 million versus the prior year.

As we said on our last earnings call, we continue to anticipate that our revenues and more significantly our earnings will be heavily backend weighted in 2019, and these first quarter outcomes are consistent with that expectation. Digging into more details, let's discuss a few key contributing factors to first quarter 2019 performance. First and foremost, the first quarter includes the impact of the PaxVax and Adapt acquisitions, both of which were completed in the fourth quarter of 2018, increasing the scale and scope of our enterprise.

NARCAN Nasal Spray revenue was $65 million. This performance reflects the impact of ongoing community access programs addressing the public interest market, as well as the initial spike in demand following adoption of naloxone co-prescription in the State of California on January 1st. As observed with the introduction of co-rx in other states, such demand is expected to taper off and normalize at a lower rate in subsequent periods.

ACAM revenue up $46 million. This increase reflects the completion of the remaining deliveries under the prior multi-year contract with the U.S. government. As Bob indicated, we continue to negotiate a follow-on contract with the U.S. government to ensure the uninterrupted supply of this critical medical countermeasure. BioThrax revenue of $12 million . This amount reflects fewer doses shift to the SNS during the period, driven mainly by timing. As we have previously discussed with you 2019 is an important transition year for the anthrax vaccine franchise as we work with the U.S. government to initiate deliveries. The next generation vaccine AV7909 under the terms of our $1.5 billion development and procurement contract with BARDA signed in September 2016. CDMO revenue of $16 million while below the level in 2018, which included a one-time milestone. The first quarter performance continues to reflect a strong base business and as a consistent and measurable contributor to total revenues.

Combined product and CDMO gross margin of 46%. This metric is similar to that in the first quarter of 2018 and continues to reflect the influence of revenue mix and our ongoing efforts to diversify our revenue sources and customer channels. Operating expenses, both R&D and SG&A are higher and largely reflects incremental operating costs from PaxVax and Adapt, which we closed in fourth quarter last year. Adjusted net loss of $6.8 million. This outcome reflects the impact of revenue mix on the period. The fixed-cost nature of our operations, as well as adjustments for acquisition-related costs, non-cash amortization and inventory step up charges stemming from the PaxVax and Adapt acquisitions.

And finally, adjusted EBITDA of $7.4 million. This result similarly, reflects the significant non-cash adjustments resulting from the most recent acquisitions. In terms of the balance sheet, we ended the first quarter in a solid liquidity position as evidenced by cash of $137 million and accounts receivable balance of $122 million. Total debt was down sequentially about $50 million compared to year-end 2018 as we manage our debt load and working capital while investing in the business.

Our current capital structure continues to position us for sustained growth and expansion .Let me now transition to guidance. Starting with our full year 2019 forecast. Today we reaffirm our full-year guidance. This includes total revenue of $1.06 billion to $1.14 billion, which reflects the following key revenue components. Anthrax vaccine procurement by the U.S. government comprising a mix of both BioThrax and AV7909 and both pursuant to existing procurement contracts. ACAM2000 sales associated with both the revenues from the first quarter as well as anticipated deliveries under the still to be finalized follow on contract with the U.S. government and NARCAN Nasal Spray sales that contemplate more normalized demand following the spike in prescriptions in California's adoption of co-rx beginning in the first quarter. Net income of $80 million to $110 million, adjusted net income of $150 million to $180 million. EBITDA of $255 million to $285 million and adjusted EBITDA of $280 million to $310 million. We are also providing a forecast for second quarter 2019 revenue of $200 million to $220 million. In addition, it is important to note that due to the expected mix of revenue for second quarter, our second quarter profitability is anticipated to be consistent with the first quarter of this year.

Furthermore, for the 12 months of 2019, let me reiterate that we anticipate our revenues and earnings for the full year will be heavily weighted to the second half of 2019. This forecast is driven by the combination of our first quarter results and second quarter forecast along with the expected timing of the Anthrax vaccine transition and the anticipated new ACAM2000 contracts. Said differently, we anticipate that the first half versus second half revenue distribution should maintain roughly in the 40, 60 split. we've experienced in the last two years. While earnings will be even more concentrated in the second half. To wrap up let me conclude with the reminder of our financial priorities for the full year 2019. They are straightforward and include the following. First on key performance metrics, we expect to realize incremental improvements to our key metrics of gross margin, net R&D margin, SG&A margin, adjusted net income margin and adjusted EBITDA margin. On the integration, we remain focused on ensuring successful completion of the integration of both PaxVax and Adapt and realizing net positive results from these investments.

On capital structure, we seek to maintain a solid credit profile and anticipate our net leverage ratio will trend toward our target range of two to three times net debt to adjusted EBITDA. And finally on liquidity. We continue to focus on having sufficient capital to both invest in the business as well as execute on attractive M&A opportunities should they arise.

That completes my prepared remarks and I'll now turn the call over to the operator to begin the question-and-answer session. Operator?


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Questions and Answers:

Operator

Thank you. (Operator Instructions) Our first question comes from Brandon Folkes with Cantor Fitzgerald. Your line is now open.

Brandon Folkes -- Cantor Fitzgerald -- Analyst

Hi, thanks for taking my questions. Firstly, on the chikungunya vaccine, your product showed some compelling data compared to nearest competitor. So, can you just help us think about when was the market opportunity is for chikungunya vaccine entered your market and how a single dose versus a two dose vaccine may play out in that market and any advantages if it does in fact have a faster time to produce neutralizing antibodies in any competition? Thank you.

Robert G. Kramer -- President and Chief Operating Officer

Thanks, Brandon. This is Bob. Appreciate the question and thanks for joining the call. I'm going to turn this question over to Abby Jenkins who runs our vaccine and anti-infective business unit and is responsible for the check programs, so Avi ?

Abigail Jenkins -- Senior Vice President, Vaccines & Anti-infectives Business Unit Head

Sure. Thanks, Bob. And hi, Brandon. Nice to speak with you again. I think your first question was on the size of the market?

Brandon Folkes -- Cantor Fitzgerald -- Analyst

Correct, yes.

Abigail Jenkins -- Senior Vice President, Vaccines & Anti-infectives Business Unit Head

Okay. I think when you look at the number of travelers who we project would be traveling around to the various chikungunya endemic areas we project that there are 64 million potential trips estimated starting as early as next year and that represents about 35 million civilian travelers going to chikungunya endemic areas. So if you try to translate that into what is the financial market opportunity. I know my, our competitors have quoted in the range of $300 million to EUR500 million that they believe is the potential global opportunity for chikungunya. I think that's certainly seems reasonable within the range of what could be potentially feasible for a product like this.

I think your second question was related to the benefits of a single dose versus two doses. I think for this particular market travelers what we found from our market research is that travelers are highly compliant with the single dose regimen and they may not be as compliant with the two dose regimen often travelers do not invest the needed time to prepare for their travel. So again a single dose offers that kind of last minute vaccination and with the 98% immune response within the seven-day timeframe.

I think that also allows for that kind of late travel planning vaccination and preparedness, as well. I'm not sure what your third question. I was trying to write it down, but could you restate what your third question was?

Brandon Folkes -- Cantor Fitzgerald -- Analyst

No, you addressed it was the on state to produce neutralizing antibodies. So thank you very much there. Perhaps one follow-up if I may just financially, you reiterated guidance, but could you talk us through whether you changed any assumptions within your guidance, especially around ACAM2000 and NARCAN? Thank you.

Richard S. Lindahl -- Executive Vice President, Chief Financial Officer & Treasurer

Yeah. Brandon, so good question. We didn't. On the whole we feel and remain confident in our ability to meet the financial guidelines that we put out there in January and as you can appreciate, there are always some puts and takes along the way. But on the whole, there has been no significant changes in the, in the overall assumptions around the composition of the financial guidance.

Brandon Folkes -- Cantor Fitzgerald -- Analyst

Great, thank you very much.

Operator

Our next question comes from Jessica (inaudible) with JPMorgan. Your line is now open.

Jessica Fye -- JPMorgan -- Analyst

Great. And thanks for taking my question. Maybe just following up on the guidance. Bob were your comments on BioThrax in the next-gen vaccines suggesting that there could be perhaps fairly low U.S. BioThrax deliveries in 2019 relative to historic levels. And can you help us think about your expectation for the proportion of your revenue guidance will be driven by the anthrax franchise in general and how might, how much of that might be from it's AV7909?

Robert G. Kramer -- President and Chief Operating Officer

Sure, Jess. Thanks for the question and for participating on the call. I think as we have signaled quite a number of quarters ago, we anticipated then and are living today, the early innings of the transition, that we've been talking about with BioThrax and AV7909 time. It's a little too early and premature to say with any level of certainty, what the composition of our anthrax vaccine revenue between BioThrax and AV7909 will be this year.

However, again, we remain confident in the assumptions as we use to build our budget for this year, that went directly into the guidance numbers for 2019, I guess perhaps what might be helpful is that for those guidance numbers for '19, we assumed and are remaining confident in the contribution of anthrax vaccine both with BioThrax and with AV7909 being at a level that's kind of in the historical range of anthrax vaccine revenue that you've seen from us over the last four, five years.

So I think that will give you some color and indication of its contribution this year.

Jessica Fye -- JPMorgan -- Analyst

Okay, that's helpful. And then again, just following up on, I think one of the prior questions about NARCAN, I think you've now recorded about 30% of the upper end of that $200 million to $220 million range. You had talked about, and it sounds like you're not changing that. So, just to be clear, you're expecting that subsequent quarters on average will be lower than this quarter?

Robert G. Kramer -- President and Chief Operating Officer

That's right. Jess. Again we're pleased with the relative overperformance in Q1 and as we talked about that was strongly and primarily the result of the co-rx adoption legislation in California. Going forward, we expect the revenue to be a more normalized level, say for these periodic blips and spikes because of additional states perhaps adopting co-rx as well.

Jessica Fye -- JPMorgan -- Analyst

Okay, great and it makes sense. I know you've talked previously about the split between retail and public interest but I think both revenue and volume being roughly 50/50, was that split different in the first quarter with the California dynamic?

Robert G. Kramer -- President and Chief Operating Officer

No, it was pretty much the same. Not materially different. (Multiple speakers) We see both markets growing.

Jessica Fye -- JPMorgan -- Analyst

Okay.

Operator

Our next question comes from Keay Nakae with Chardan. Your line is now open.

Keay Nakae -- Chardan -- Analyst

Yes. With respect to NARCAN, does the company anticipate any shifts in your strategic marketing of the product with the entry into the market of competitive products?

Robert G. Kramer -- President and Chief Operating Officer

Yeah. Keay, So thanks for the question and thanks for participating. As we've talked and when we went through our diligence process last year, we thoroughly analyze kind of the competitive profile for NARCAN Nasal Spray as well as potential competition coming in, I think we shared with everyone that we anticipated competition into this market, whether it be generic or branded or even OTC competitors down the road.

So again, we remain focused on making sure that we stay tuned into attending to the needs of patients in that 34 million patient group that I described in my opening remarks and making sure that we're doing everything we can to drive awareness, increased access to and to grow the affordability of what we think is a very unique and critically important naloxone product in NARCAN Nasal Spray.

Keay Nakae -- Chardan -- Analyst

Okay. If I could ask the second question that relates to the new U.S. customers of BioThrax, can you give us any more color on the nature of those contracts and what the potential is going forward?

Robert G. Kramer -- President and Chief Operating Officer

Yeah, I think what we see as a general continuing maturity and interest outside of the U.S. for any number of our products in the portfolio, including BioThrax as we've talked about. The international market for these products is just beginning to mature. It's rather in an infant stage. We stand prepared with our supply chain improve to meet the -- what we see as an increasing demand across the portfolio for BioThrax and for any of the other products that we manufacture. So again, we're pleased with the progress, but this is going to be a slow maturity over the next several years.

Keay Nakae -- Chardan -- Analyst

Okay, that's helpful. Thanks.

Operator

Our next question comes from Boris Peaker with Cowen. Your line is now open.

Boris Peaker -- Cowen -- Analyst

Great, thanks for taking the question. I just want to probe a little further on NARCAN, I just want to maybe understand for all the NARCAN, that's being prescribed, curious of what fraction of the inhalers are actually being used and then how long is the shelf life of it? And what happens to the ones that aren't being used beyond their shelf life?

Robert G. Kramer -- President and Chief Operating Officer

So thanks Boris for joining the call. The shelf life is two years. As I said in my prepared remarks, we're looking at the data to potentially extend the shelf life. We think that provides some additional value to patients. I'll ask, Doug White, the Head of the Devices Business Unit to comment on your other questions, but I'm not aware that we have insight into your other questions. But, Doug, do you want to comment here?

Doug White -- Senior Vice President, Devices Business Unit Head

Sure. Thanks, Bob. And thanks for Boris for the question. So we actually do not have data or access to data around utilization in the retail market, in the pharmacy market is -- actually the kit or the units that are being distributed out and someone's covered at home. So we really don't have a lot of data around that. We do know though that we anticipate there will be some exploration, as we go forward. So we want to make sure that as part of our commitment to continuing to build the value for the patient themselves, that we extend the shelf life. So we are undergoing studies right now to do just that.

Boris Peaker -- Cowen -- Analyst

But I just want to kind of get a sense of for -- particularly majority of NARCAN, that's purchase today maybe. Is it mostly to replace expiring units or is it mostly to replace actually used units or how does that kind of breakdown?

Doug White -- Senior Vice President, Devices Business Unit Head

Yes, that's a good question. In the public interest market, there is some replacement, and we do have data that shows that utilization is about 5% to 10% among first responders, and individuals in public health -- in that public health space. However, when you think about the potential or the number of individuals that are at risk, 34 million that was highlighted by Bob. We're currently at less than 5%. So the majority of the sales to the retail market are new patients not replacement and frankly even in the public interest market, we are not fully saturated or the market is not fully saturated and the large majority of the units that are being distributed -- are being distributor new not replacement.

Boris Peaker -- Cowen -- Analyst

Got you. And lastly, just follow-up on that, in terms of co-prescription in California, do you also have a sense of like what fraction of opioid prescriptions actually get a NARCAN filled within and how frequently will these patients, then will have to get a new inhalers or is it just like once every two years or once every several certain number of prescriptions like how does that whole process work?

Doug White -- Senior Vice President, Devices Business Unit Head

It's a great question. So we have some data that we presented to the FDA, at the FDA AdCom from (inaudible) we did an analysis and it appears that approximately 10% of individuals that could be eligible based on the fact that they're getting a higher risk prescription actually fill the prescription. It doesn't really indicate whether they're getting the prescription or not because there is an abandonment rate of small price we can't -- we can estimate but there's an abandonment rate.

So I think the other part of your question, you had another part to the question, I think?

Boris Peaker -- Cowen -- Analyst

Yeah, I just wanted to know, I guess just the other part was how frequently do these patients received new NARCAN inhalers by the new co-prescribing regulation. Is it just like once every two years, or there's some other provision there?

Doug White -- Senior Vice President, Devices Business Unit Head

No, it would just be based on whether or not they had to deploy it, they would replace it and if it hadn't been deployed it would be every two years for those patients that have already received a NARCAN prescription.

Boris Peaker -- Cowen -- Analyst

Great. But I think

Robert G. Kramer -- President and Chief Operating Officer

I think importantly, again just to drive some of the point. There are 34 million patients, who are deemed to be at risk by even CDC guidelines and a significant minority of those individuals by contrast are actually filling any type of prescription for naloxone product, so I understand your questions around what's really driving the revenue stream and the demand. Clearly it's in -- in furtherance of co-prescribing and safe toward adopted it's at the pharmacy chains, which are now on a national and regional basis, so it's not being driven by simply expired product needing to be replaced, it's on the front end of that distribution.

Boris Peaker -- Cowen -- Analyst

Great. Thank you for the detailed explanation.

Operator

Our next question comes from Chris Sakai with Singular Research. Your line is now open.

Christopher J. Sakai -- Singular Research -- Analyst

Hi, I'm in for Lisa Springer today. Just had a question on the generic NARCAN product and what are you doing to address this generic NARCAN and how is it affecting sales?

Robert G. Kramer -- President and Chief Operating Officer

Yeah. Thanks, Chris. Thanks for joining and filling in for Lisa. Appreciate it. Obviously as we've talked about, we are keenly aware of and tracking all types of competition in this space and as we indicated earlier, we did a very robust diligence process prior to making this acquisition, including the potential competitors. But most importantly, including the IP protection and the strength of the patent family that surrounds this product and got very comfortable, very quickly that there is a durable business year. I think what's important to remember, and just be reminded of this. This is a growing epidemic. It's not yet matured, the market is growing every day. NARCAN Nasal Spray is a product, it has a unique profile in terms of its ease of use and ease of administration that fits nicely into both the prescription opioids side or patient group that I described as well as the illicit drug use side of things. So while we are continuing to monitor potential competitors including generic competitors, we are keenly focused on making sure that we're addressing the needs of this extremely large 34 million patient group.

And just as a reminder, just as a reminder, there is no active launched generic product in the market today. I think you're probably referring to Teva's approval recently by the FDA. But just to be clear that they have not launched at risk and we will monitor what they're doing.

Christopher J. Sakai -- Singular Research -- Analyst

Okay, great. And then secondly for BioThrax, how is that I know how is that doing in the Europe, and how is that doing compared to what you forecasted?

Robert G. Kramer -- President and Chief Operating Officer

Yes. So every year we include a conservative estimate of sales for ex-U.S. customers for the portfolio of products that we market including BioThrax as we've talked about on earlier calls. The market for our products, including BioThrax outside the U.S. is still maturing still developing. There are pockets in specific countries that have a keen interest in doing for their citizens and their military populations what the U.S. government is doing, but those markets are not nearly as large or not nearly as mature as the rather robust disciplined process. The U.S. government has gone through to prioritize chemical and biologic threats and more importantly, develop the funding required to procure and build stockpile protections.

Christopher J. Sakai -- Singular Research -- Analyst

Okay, thank you.

Operator

The next question comes from Frank --price far with Laidlaw. Your line is now open.

Francois Brisebois -- Laidlaw -- Analyst

Hey. Thanks for taking the questions. I just quickly, I was wondering on the ACAM side in terms of contract negotiations, do you guys feel comfortable that the base case here would kind of be where the previous contract was at?

Robert G. Kramer -- President and Chief Operating Officer

Yeah, Frank. Thanks for the question and thanks for joining the call. I think just as a reminder to everyone. The last time, the U.S. government negotiated a smallpox contract was in 2008. So 11 years ago, and we knew going into this as we complete deliveries under the old contract that when we got into active negotiations for the follow-on contract, it was going to be challenging.

This is a critically needed medical countermeasure again the U.S. government's committed strategy is to have sufficient supply for the protection of all civilians in the United States. So it's a huge stockpile. It's a huge rotation requirement and to be honest, when we get into these negotiations on follow-on contracts, we want to make sure that the resulting outcome is a robust, durable, fair contract for both the government and for the company and if it takes a little more time for us to come out with that outcome, we're going to take the amount of time that it require. So while it may have, while it may be perceived is taking longer than we expected.

Again, we're confident that we will get to an end result that's consistent with what we went into it and consistent with the guidance expectations that we put into 2019 numbers.

Francois Brisebois -- Laidlaw -- Analyst

All right, thank you. And then just kind of a follow-on Jessica's question about the NARCAN sales here tapering off a little bit if you keep the guide the $200 million to $220 million guidance, was mentioned previously. So would you -- can you give us an idea of the breakdown of, is this more of an impact of potential competition coming in or just the co-rx lumpiness and is it more one or the other?

Robert G. Kramer -- President and Chief Operating Officer

It's not competition just to be clear and then our, we have a kind of a cadence and a run rate expectation for the base NARCAN Nasal Spray business that is occasionally impacted in spite a little bit because of states adopting the co-rx legislation, California was the Q1 impact or example of that. There will likely be spikes down the road in 2019 when other states adopt similar legislation. So that's highly dependent upon the size of the state in the population, California, obviously was an oversized spike just because of the population.

But we again are comfortable with the 20 of the $200 million to $220 million range of NARCAN revenue for '19 as we said last call and reiterate on this call. It's operating at the upper end of that range. We'll see how things unfold over the next quarter or two. And if the overperformance relative to our guidance continues to occur, then we will be doing something with that guidance range.

Francois Brisebois -- Laidlaw -- Analyst

Okay, great. And lastly, if I may just jump in . I was wondering, you mentioned delivery methods or basically a longer than two years usage of NARCAN. Do you have any idea what would be the optimum lines of usage without maybe losing patients without affecting the top line?

Robert G. Kramer -- President and Chief Operating Officer

Yes. So if you're referring to potential extension of shelf life for NARCAN, currently it's two years, as I said and they were evaluating the data and the data will drive whether or not we think we can show extended use or extended shelf life or not. But we will be clear on that when we get to that analysis point.

Francois Brisebois -- Laidlaw -- Analyst

All right. That's it from me. Thank you.

Robert G. Kramer -- President and Chief Operating Officer

Thanks, Frank.

Operator

(Operator Instructions) Our next question comes from Richard Baxter (ph). Your line is now open.

Unidentified Participant -- -- Analyst

Thanks very much. I just -- can somebody explain to me how the approval of a generic product like have a -- will not be kind of affecting your long-term forecast?

Robert G. Kramer -- President and Chief Operating Officer

Hey, Richard. Thanks for joining the call. Any generic entrant into this market will impact obviously, our market share. What we said last year when we evaluate this business is that the naloxone market in particular in the NARCAN Nasal Spray is a growing market. We don't know whether there, any generic competitor or branded or OTC products will come into the mix. We assumed just to be clear that there would be competition when we went through our internal evaluation of the NPV value of the business. So I think just to be clear, a generic entrant would have an impact. However, I think it's important to understand that we have established significant brand, awareness, and reputation for the product. Number two, as I commented in my opening remarks, under the prior ownership, there was a very responsible and practical pricing adopted at launch that we have continued with. And in fact, we have not taken a price increase and don't expect too in the near future. So I think in terms of the typical experience with a generic, it's a little different potentially with NARCAN Nasal Spray in this naloxone market, but just to be clear, there will be an impact on the business. However, this market is still growing, is still maturing and again we are doing everything we can to focus on these three areas of affordable access and awareness.

Unidentified Participant -- -- Analyst

Thank you.

Operator

And at this time, I'm showing no further questions. I'd like to turn the call back over to Mr. Burrows for any closing remarks.

Bob Burrows -- Vice President of Investor Relations

Thank you, Sara (ph). And with that ladies and gentlemen we now conclude the call. Thank you for your participation, and please note an archived version of the webcast of today's call will be available later today and accessible through the company website. Thank you again, and we look forward to speaking with all of you in the future. Goodbye.

Operator

Ladies and gentlemen, thank you for your participation in today's conference. This does conclude the program and you may now disconnect. Everyone have a great day.

Duration: 51 minutes

Call participants:

Bob Burrows -- Vice President of Investor Relations

Robert G. Kramer -- President and Chief Operating Officer

Richard S. Lindahl -- Executive Vice President, Chief Financial Officer & Treasurer

Brandon Folkes -- Cantor Fitzgerald -- Analyst

Abigail Jenkins -- Senior Vice President, Vaccines & Anti-infectives Business Unit Head

Jessica Fye -- JPMorgan -- Analyst

Keay Nakae -- Chardan -- Analyst

Boris Peaker -- Cowen -- Analyst

Doug White -- Senior Vice President, Devices Business Unit Head

Christopher J. Sakai -- Singular Research -- Analyst

Francois Brisebois -- Laidlaw -- Analyst

Unidentified Participant -- -- Analyst

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