Despite the real problems with the additional indication being sought for suzetrigine, this drop in the stock is still an unambiguously appealing opportunity to buy the dip. Overall, Vertex's data on the candidate's efficacy for general acute pain look better than the new data on acute pain in a specific disease context.

Shares of Vertex Pharmaceuticals Inc. VRTX slid 0.46% to $408.76 Friday, on what proved to be an all-around rough trading session for the stock market, with the S&P 500 Index SPX falling 1.11% to 5,970.84 and Dow Jones Industrial Average DJIA falling 0.77% to 42,992.21. The stock's fall snapped a four-day winning streak.

Vertex Pharmaceuticals Incorporated (NASDAQ:VRTX) announced results from its Phase 2 study of suzetrigine for painful lumbosacral radiculopathy (LSR), a disorder that causes pain in the lower back and hip that radiates down the back of the thigh into the leg.

Vertex Pharmaceuticals shares sank Thursday after the company reported mixed results in a Phase 2 drug trial to treat lumbosacral radiculopathy (LSR), which causes leg and back pain.

This was the stock's fourth consecutive day of gains.