When taking Prozac medicine it's best to take the Prozac in the morning so that it has time to work during the day.
When I was prescribed Prozac the doctor told me I should take it first thing in the morning and then another dose of the Prozac around 12:00 PM
If you're just beginning to take Prozac it can take between 4 to 6 weeks to feel the full affects of the Prozac but continue taking the Prozac as the doctor prescribes and if you notice any bad side affects speak with your doctor.
Some people only need to take Prozac one per week while others may need to take the Prozac daily but your doctor will tell you exactly how to take the Prozac and the dosages you need.
Never take more than the dosage of the Prozac that your doctor prescribes and don't stop taking it unless you speak with your doctor first.