Does Prozac cause insomnia?

Prozac (fluoxetine) is an antidepressant that belongs to the class of serotonin reuptake inhibitors. Different people may have different reactions to this drug, and some of these may include changes in sleep.
In some people, Prozac can cause insomnia as a side effect. However, in others, it can have a calming effect and may even help improve sleep. It is important to note that reactions to the medication may be unique to each person, and the effects of Prozac on sleep are best discussed with a doctor.
If you experience sleep problems while taking Prozac, it is important to contact your doctor to discuss possible strategies for managing these side effects. It is not recommended to change the dosage or stop taking the medication without consulting a medical professional.

Insomnia is considered a very common side effect of this antidepressant affecting up to 33% of patients being treated with Prozac (fluoxetine).

Now, in most cases, as everyone reacts differently to medications, very common to common side effects tend to last 1 week to 10 days, if they don't subside do inform your Dr..

Perhaps you can ask your DR. for a sleep aid until this side effect subsides.