how long does it take for prozac to work

Prozac (fluoxetine) typically takes about 4 to 6 weeks to start working fully. Some people may begin to notice improvements in symptoms such as sleep, energy, and appetite within 1 to 2 weeks, while mood and other core symptoms of depression or anxiety may take longer, up to 8 weeks or more, to improve. For some conditions like OCD, it may take 6 to 12 weeks for Prozac to have its full effect. Early signs that Prozac is working include feeling calmer, more energetic, sleeping better, and having less anxiety or depressive symptoms. It's important to take the medication as prescribed and consult a doctor if no improvement is seen after several weeks or if side effects are problematic.