The time during which a drug is effective is called the duration of action ... 4-6 hours 10 tabs for adults, 5 tabs for children Extra-Strength Tylenol 500 mg 1000 mg (2 tabs) 6 hours 6 tabs for ...

The health authority issued a separate news release for Riva Acetaminophen 500mg with the ... might contain tablets with 325 milligrams of the drug. Health Canada says in both releases the ...

Medically reviewed by Brigid Dwyer, MD It is possible to overdose on Tylenol (acetaminophen). Early symptoms include nausea ...