Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of Omnicell (NASDAQ:OMCL) rose by as much as 15% at the opening bell, and still hold a 10% gain as of this writing, as investors continue to react to the company's strong earnings report, which was released after yesterday's close.

So what: Omnicell's quarterly revenue soared 17% year over year to hit $105.8 million, and adjusted earnings hit $0.29 per share for the fourth quarter. Both results topped Wall Street's expectations, which had been for $101.1 million in revenue and $0.28 in EPS.

The company also updated its guidance for both the full year and first quarter of 2014 during its earnings call. Omnicell now expects to generate between $96 million and $98 million in revenue and approximately $0.23 in adjusted EPS for the first quarter, and anticipates full-year revenue to be in the $415 million to $425 million range, with adjusted earnings of $1.17 to $1.23 per share for the year. Omnicell's first-quarter guidance hits Wall Street's targets of $97 million in revenue and $0.23 in EPS right on the nose, and its full year guidance is a little bit better than the $417 million in revenue and $1.17 in EPS analysts were expecting.

Now what: Omnicell is certainly growing, but its very narrow beat on last night's earnings, coupled with the fact that it projects a maximum EPS growth rate of 14% for the current year over 2013's $1.08 in adjusted EPS, makes this reaction a bit too optimistic. Omnicell's shares had already gained 45% before today's pop, but its bottom line isn't growing fast enough to keep up with investor enthusiasm. It could still be a viable investment, but I'd be very cautious after today.

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Alex Planes has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.