Jim Cramer says you can't draw any conclusions about drug pricing from a tweet. Drug stocks including Amgen (AMGN) were sharply lower following a tweet from President Trump that alluded that the president is working on a plan to create competition in the drug industry. 

WATCH MORE: See all of Jim Cramer's latest videos here

More from Video

One-on-One With Carnival Corporation CEO Arnold Donald (Watch)

One-on-One With Carnival Corporation CEO Arnold Donald (Watch)

Replay: Jim Cramer on the Markets, Tiffany, Micron Technology and Union Pacific

Replay: Jim Cramer on the Markets, Tiffany, Micron Technology and Union Pacific

Carnival CEO Arnold Donald: China Will Become the Largest Cruise Market

Carnival CEO Arnold Donald: China Will Become the Largest Cruise Market

KPMG US Chair and CEO: Survey Shows CEOs are Still Worried About Cyber

KPMG US Chair and CEO: Survey Shows CEOs are Still Worried About Cyber

Rent the Runway co-founder Chats with Cramer on Equal Pay and a Good Pair Jeans

Rent the Runway co-founder Chats with Cramer on Equal Pay and a Good Pair Jeans