Once you stop taking Prozac the Prozac remains in your system for 6 to 7 days.
After 7 to 8 days the Prozac should be fully out of your system and you should no longer feel the effects of the Prozac.
Only stop taking Prozac at the direction of the doctor and slowly stop taking it until you no longer need to take the Prozac anymore.
After you stop taking the Prozac it will take between four and six days after fully stopping the Prozac prescription for it to reduce its effectiveness by 50 percent.