What are the side effects of prozac (fluoxetine)?

It depends.: Adverse effects can be seen with low doses of fluoxetine. The most common are: insomnia, nausea, weakness, headache, diarrhea, loss of appetite, drowsiness, anxiety, tremor, dry mouth, decreased sex drive, sweating, dizziness, ...The list goes on. Adverse effects are not very predictable and at low doses not as probable. Some may occur later in the course of treatment.

Prozac (fluoxetine) Side Effects: may include: decreased appetite, nausea, diarrhea, constipation, upset stomach, GI bleeding, weight loss or weight gain, insomnia,^ anxiety or irritability, tremor, headaches, drowsiness, sexual dysfunction, decreased libido, triggering mania, hypomania, psychosis or OCD, hair loss, allergic reaction, hyponatremia, bruising, etc. There is an FDA warning for possible ^ in suicidal ideations.