A member asked:

How long does one bupropion xl 150mg take to fully release into body. also how long does one 150mg of bupropion sr take to fully release into body?

A doctor has provided 1 answer

Highly variable: these drugs are designed to be released over the course of 12 hours (sustained release drugs in general) or 24 hours (XL or extended release drugs). However, this is an average, and in some people it may be somewhat longer or shorter. It's the reason one of them is dosed once daily and the other twice daily.

Answered 12/22/2015

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