Please ensure Javascript is enabled for purposes of website accessibility

Is Cara Therapeutics a Buy for Summer 2021?

By Zhiyuan Sun - May 29, 2021 at 6:41AM

You’re reading a free article with opinions that may differ from The Motley Fool’s Premium Investing Services. Become a Motley Fool member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn More

The future of this troubled clinical-stage biotech rests on a single drug candidate that management hopes will treat an extremely common condition.

Cara Therapeutics (CARA 2.04%) is an aspiring biotech company that seeks to combat an extremely common, yet under-the-radar, medical condition -- itchiness. Its efforts hit a stumbling block late last month, however, with the release of not-so-impressive clinical results for its sole drug candidate. The stock, which had more than doubled since the beginning of October, saw virtually all of those gains vaporized in a matter of days.

Betting on small-cap biotechs ahead of clinical data releases is probably one of the riskiest investment strategies out there. But what's next for this company? Are there riches ahead for investors who can withstand Cara Therapeutics' volatility?

Woman scratching her skin.

Image source: Getty Images.

Concerning Korsuva results

Cara Therapeutics is a textbook development-stage biotech company with no product revenue, $228.3 million in cash, and a net loss of $23.3 million per quarter. Its only pipeline candidate is Korsuva, a k-opioid receptor (KOR) agonist targeting KORs in the peripheral nervous system and immune cells to combat pruritus -- a.k.a. itching.

Korsuva is being tested as a treatment to alleviate the itching common in patients with severe/chronic kidney disease, as well as those with atopic dermatitis, chronic liver disease, and the nerve disorder notalgia paresthetica. The drug is being administered in an oral formulation for all of those indications except the first, where it is being delivered via injection.

On April 29, Cara Therapeutics announced that Korsuva had failed to hit its primary endpoints in a phase 2 clinical trial among atopic dermatitis patients at week 12.

The company says it's still going to advance the program, as the drug did demonstrate efficacy in an interim analysis. When a candidate drug's results follow that pattern, though, it's usually because it has a marginal treatment benefit that dissipates with time. Hence, there is the risk that the U.S. Food and Drug Administration (FDA) may not accept the company's proposals for a phase 3 clinical trial in this indication.

Phase 2 studies for other indications are still in their early days. A data readout for Korsuva in patients with chronic liver disease is due in the second half of 2021. Meanwhile, clinical trials of Korsuva for use in patients with severe chronic kidney disease have already finished and are waiting for regulatory review.

In the study conducted by Cara Therapeutics and its partner, Vifor Fresenius Medical Care Renal Pharma, 52% of patients with moderate to severe kidney disease who were on dialysis reported at least a 3-point improvement on a scale measuring itchiness (which is subjective) after week 12. The scale ranges from 0 to 10. 

Those results are not as impressive as they might appear. For starters, 42% of patients with the condition reported similar levels of improvement after taking a placebo. There were also slightly higher incidences of diarrhea, vomiting, nausea, dizziness, and falling in the treatment group. Keep in mind, as well, that this study involved Korsuva as an injection and is applied to a very narrow indication.

Can you count on Cara Therapeutics? 

I think the kidney disease study results for Korsuva largely reinforce the theory that the drug offers small to negligible benefits to patients, as well as some potential downsides. Additionally, the drug is being given orally in all the other studies. That means even less absorption, and thus, less efficacy. Overall, given the drug's questionable clinical results and niche indications, biotech investors should probably look elsewhere for better opportunities. 

Zhiyuan Sun has no position in any of the stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy.

Invest Smarter with The Motley Fool

Join Over 1 Million Premium Members Receiving…

  • New Stock Picks Each Month
  • Detailed Analysis of Companies
  • Model Portfolios
  • Live Streaming During Market Hours
  • And Much More
Get Started Now

Stocks Mentioned

Cara Therapeutics, Inc. Stock Quote
Cara Therapeutics, Inc.
CARA
$11.50 (2.04%) $0.23

*Average returns of all recommendations since inception. Cost basis and return based on previous market day close.

Related Articles

Motley Fool Returns

Motley Fool Stock Advisor

Market-beating stocks from our award-winning analyst team.

Stock Advisor Returns
377%
 
S&P 500 Returns
123%

Calculated by average return of all stock recommendations since inception of the Stock Advisor service in February of 2002. Returns as of 08/09/2022.

Discounted offers are only available to new members. Stock Advisor list price is $199 per year.

Premium Investing Services

Invest better with The Motley Fool. Get stock recommendations, portfolio guidance, and more from The Motley Fool's premium services.