A member asked:

How long do the effects of 1/2 of a 5 mg xanax (alprazolam) last?

2 doctors weighed in across 2 answers

Xanax (alprazolam): It can last up to 8 hours.

Answered 10/22/2012

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Dr. Alan Ali answered

Specializes in Psychiatry

Xanax (alprazolam): U probably meant 0.5 mg. The effects can last from 4 to 8 hours, depending on how severe the anxiety attack is.

Answered 10/4/2016

5.5k views

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