KEY POINTS
  • CNBC's Jim Cramer issues a warning to investors about the pharmaceutical sector, which includes high-profile stocks like Allergan and Gilead.
  • This market is becoming difficult for the once-safe stocks, the "Mad Money" host says.

The once-"safe" pharmaceutical stocks are becoming too difficult for investors to own, CNBC's Jim Cramer warned on Thursday as much of the stock market lifted off its October lows.

"These stocks ... used to be safety-first situations. No longer," he told investors. "These names are bouncing today, but the next time the market gets slammed, you don't want to rely on a broken drug stock — or food stock, for that matter — to protect your portfolio."