A member asked:

How long does it take for diazepam to start being effective ? after taking tablet how long does take for sedative effect to come on ?

A doctor has provided 1 answer
Dr. Gene Tekmyster answered

Specializes in Physical Medicine and Rehabilitation

Fairly quickly: Medications such as diazepam taken orally have a pretty quick onset. Usually as quick as 30 minutes. May take a bit longer but for sure less than an hour.

Answered 9/11/2018

3.2k views

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Can i take 4mg of diazepam with a 25mg doxylamine succinate tablet?

A doctor has provided 1 answer