45min to 2hrs: The Codeine in tylenol (acetaminophen) 4 is rapidly absorbed and should give pain relief within 45 minutes. Once you have taken a few doses it reaches its maximum effect about 2 hours after you take each dose.
Answered 6/24/2014
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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