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1994 - Added warning about risk of liver damage when combining Tylenol and alcohol
- Added warning "do not use with any other product containing acetaminophen"
1998 - Added "do not exceed recommended dose"
2004 - Added specific warning about liver damage if not used as directed
2011 - Eliminated Tylenol infant drops - a highly concentrated formula blamed for accidental overdoses by parents - switching to a single formula for all children Tylenol products
- Lowered the maximum daily adult dose of Extra Strength Tylenol to 3,000 milligrams a day, or six pills, unless directed to take more by a doctor. The maximum daily dose was previously 4,000 milligrams a day, or eight pills. Also lowered maximum adult dose of regular strength Tylenol
- Changed directions from "take 2 caplets every 4-6 hours while symptoms last" to "take 2 caplets every 6 hours while symptoms last" for Extra Strength Tylenol. Also changed instructions on regular strength Tylenol.