I been on 10mg to start off and I can't get good sleep. Is it possible I have developed insomnia that quickly from using this drug?
Is it possible to develop insomnia within the first week of using Prozac?
- Asked
- 17 Jul 2018 by Anonymous0987543
- Updated
- 22 July 2018
- Topics
- prozac, insomnia, sleep disorders, sleep, anxiety and stress, sleep disorder, drug
Responses (2)
Hi, Anon!
"Very common (10% or more of users): Insomnia (up to 33%), anxiety (up to 15%), nervousness (up to 14%)"
"Side effects have been reported to be generally mild and transient. They are most common during the first 2 weeks of treatment and decrease in intensity and frequency with continued treatment. They generally do not lead to treatment cessation."
Best regards, Wildcat
Yes, this is a common side effect so it's typically taken in the morning. If you're taking it at night definitely consider switching to the AM. See how it goes & speak with your MD about all of your side effects. Good luck!

Further Information
- Prozac Information for Consumers
- Prozac Information for Healthcare Professionals (includes dosage details)
- Side Effects of Prozac (detailed)
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