A member asked:

How long would prozac (fluoxetine) take to kick in?

A doctor has provided 1 answer

2 to 8 weeks: The initial improvement is usually felt at least on some day within two to 4 weeks. If used for ocd, significant improvement can take up to 12 weeks. In severe pms it can work within a day or two because it is working through a different mechanism. Best wishes to you.

Answered 8/10/2013

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