4 doctors weighed in:
How long do the effects of tylenol (acetaminophen) last?
4 doctors weighed in

3 doctors agree
In brief: Average 3 to 6 hours
Acetaminophen, the main ingredient in medications such as tylenol, (acetaminophen) is a medication that is quickly absorbed in our gastrointestinal tracts.
The average time for it to "start working" is anywhere from 10 to 30 minutes, and the average time it stays in your body is anywhere from 4 to over 8 hours. In children it may be less time and in infants longer. Everybody absobs medicine differently.

In brief: Average 3 to 6 hours
Acetaminophen, the main ingredient in medications such as tylenol, (acetaminophen) is a medication that is quickly absorbed in our gastrointestinal tracts.
The average time for it to "start working" is anywhere from 10 to 30 minutes, and the average time it stays in your body is anywhere from 4 to over 8 hours. In children it may be less time and in infants longer. Everybody absobs medicine differently.
Dr. Josephine Ruiz-Healy
Dr. Josephine Ruiz-Healy
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