What happened Acadia Pharmaceuticals (NASDAQ: ACAD), a mid-cap biopharma, continued its recent rebound last month as its stock gained a healthy 16.5%, according to data from S&P Global Market Intelligence. The drugmaker's shares perked up in late February after the release of its upbeat fourth-quarter and full-year earnings report. Image source: Getty Images. So what Acadia's stock collapsed last year as the result of a CNN report questioning the safety of its Parkinson's disease psychosis medication Nuplazid. Since the start of 2019, however, the stock has regained a big chunk of this lost ground, thanks to the Food and Drug Administration reaffirming Nuplazid's risk-to-reward profile last September. The big deal is that Nuplazid no longer appears to be at risk of being pulled from the market over safety issues. Now what Can Acadia's stock fly even higher? The answer appears to be tied to the progress of the company's late-stage clinical pipeline. Acadia is slated to announce the top-line results for Nuplazid's late-stage schizophrenia trial by midyear. This schizophrenia study, in kind, will probably set the tone around the stock for the remainder of the year. Investors are clearly expecting Nuplazid to branch out into multiple, high-value indications. As proof, the biopharma's shares already sport one of the richest valuations within its peer group at over 13 times this year's projected sales. The take-home point is that Acadia can arguably ill afford a clinical setback at this stage; otherwise, its top-shelf valuation may vanish in the blink of an eye. 10 stocks we like better than Acadia PharmaceuticalsWhen investing geniuses David and Tom Gardner have a stock tip, it can pay to listen. After all, the newsletter they have run for over a decade, Motley Fool Stock Advisor, has quadrupled the market.* David and Tom just revealed what they believe are the ten best stocks for investors to buy right now... and Acadia Pharmaceuticals wasn't one of them! That's right -- they think these 10 stocks are even better buys. See the 10 stocks *Stock Advisor returns as of March 1, 2019George Budwell 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.