Prozac Dosage/Direction for Use

For oral administration to adults only.
Depression, with or without associated anxiety symptoms: Adults and the elderly: The recommended dose is 20 mg daily. Dosage should be reviewed and adjusted if necessary, within 3 to 4 weeks of initiation of therapy and thereafter as judged clinically appropriate. Although there may be an increased potential for undesirable effects at higher doses, in some patients, with insufficient response to 20 mg, the dose may be increased gradually up to a maximum of 60 mg (see Pharmacology: Pharmacodynamics under Actions). Dosage adjustments should be made carefully on an individual patient basis, to maintain the patients at the lowest effective dose.
Patients with depression should be treated for a sufficient period of at least 6 months to ensure that they are free from symptoms.
Obsessive-compulsive disorder: Adults and the elderly: The recommended dose is 20 mg daily. Although there may be an increased potential for undesirable effects at higher doses, in some patients, if after two weeks there is insufficient response to 20 mg, the dose may be increased gradually up to a maximum of 60 mg.
If no improvement is observed within 10 weeks, treatment with fluoxetine should be reconsidered. If a good therapeutic response has been obtained treatment can be continued at a dosage adjusted on an individual basis. While there are no systematic studies to answer the question of how long to continue fluoxetine treatment, OCD is a chronic condition and it is reasonable to consider continuation beyond 10 weeks in responding patients. Dosage adjustments should be made carefully on an individual patient basis, to maintain the patient at the lowest effective dose. The need for treatment should be reassessed periodically. Some clinicians advocate concomitant behavioural psychotherapy for patients who have done well on pharmacotherapy. Long-term efficacy (more than 24 weeks) has not been demonstrated in OCD.
Pre-menstrual Dysphoric Disorder (PMDD): The recommended dose of fluoxetine for the treatment of PMDD is 20 mg/day given continuously (every day of the menstrual cycle) or intermittently (defined as starting a daily dose 14 days prior to the anticipated onset of menstruation through the first full day of menses and repeating with each new cycle).
All Indications: The recommended dose may be increased or decreased. Doses above 80 mg/day have not been systematically evaluated.
Elderly patients: Caution is recommended when increasing the dose, and the daily dose should generally not exceed 40 mg. Maximum recommended dose is 60 mg/day.
Hepatic impairment: A lower or less frequent dose (e.g. 20 mg every second day) should be considered in patients with hepatic impairment (see Pharmacology: Pharmacokinetics under Actions), or in patients where concomitant medication has the potential for interaction with PRO ZAC (see Interactions).
Withdrawal symptoms seen on discontinuation of PROZAC: Abrupt discontinuation should be avoided. When stopping treatment with PRO ZAC the dose should be gradually reduced over a period of at least one to two weeks in order to reduce the risk of withdrawal reactions (see Precautions and Adverse Reactions). If intolerable symptoms occur following a decrease in the dose or upon discontinuation of treatment, then resuming the previously prescribed dose may be considered. Subsequently, the physician may continue decreasing the dose, but at a more gradual rate.
Method of administration: For oral administration.
Fluoxetine may be administered as a single or divided dose, during or between meals.
When dosing is stopped, active drug substances will persist in the body for weeks. This should be borne in mind when starting or stopping treatment.