-Initial dose: to 10 mg orally in divided doses every 6 to 8 hours
-Maintenance dose: 1 to 5 mg/day
-Maximum dose: Up to 40 mg/day
-Maintenance doses may be given as single daily doses.
-Many patients achieve therapeutic effect with doses of less than 20 mg. Patients who are severely disturbed or inadequately controlled may require a dose of up to 40 mg/day.
Fluphenazine Decanoate for Injection:
-Initial dose: to 25 mg deep IM injection into the gluteal region
-Maintenance dose: to 100 mg IM, usually every 3 to 4 weeks
-Maximum dose: 100 mg/injection
Fluphenazine HCl for Injection:
-Initial dose: to 10 mg IM, given as divided doses every 6 to 8 hours
-Maximum dose: Up to 10 mg/day
-Patients may switch from Fluphenazine HCl for Injection to oral formulations when symptoms are controlled. The dose of an oral formulation is approximately 2 to 3 times the dose of fluphenazine HCl for injection.
-Fluphenazine decanoate for injection may be given subcutaneously.
-Management of manifestations of schizophrenia
-Management of patients requiring prolonged parenteral neuroleptic therapy (., patients with chronic schizophrenia)
The intravenous route is not FDA approved and is generally not recommended except when no other alternatives are available. Intravenous administration appears to be associated with a higher risk of QT prolongation and torsade de pointes (TdP) than other forms of administration. The manufacturer recommends ECG monitoring for QT prolongation and arrhythmias if IV administration is required. A dose in the range of 1 to 5 mg IV has been suggested, with the dose being repeated at 30 to 60 minute intervals, if needed. A maximum IV dose has not been established. The lowest effective dose should be used in conjunction with conversion to oral therapy as soon as possible.
Involuntary movement: Like other medications to control symptoms of schizophrenia, fluphenazine decanoate may cause rhythmic involuntary movements, known as tardive dyskinesia . Tardive dyskinesia is more likely to occur in women and seniors. These movements may involve only the tongue, face, mouth, or jaw, or they may include the extremities and trunk. Tardive dyskinesia is not reversible for some people. Report involuntary movements including sticking out the tongue, puckering mouth, or chewing movements to your doctor as soon as possible.