Usual Adult Dose for Psychosis:
Oral:-Initial dose: 2.5 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/dayOral Comments:-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.Parenteral:Fluphenazine Decanoate for Injection:-Initial dose: 12.5 to 25 mg deep IM injection into the gluteal region-Maintenance dose: 12.5 to 100 mg IM, usually every 3 to 4 weeks-Maximum dose: 100 mg/injectionFluphenazine HCl for Injection:-Initial dose: 2.5 to 10 mg IM, given as divided doses every 6 to 8 hours-Maximum dose: Up to 10 mg/dayParenteral Comments:-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. Uses:-Management of manifestations of schizophrenia-Management of patients requiring prolonged parenteral neuroleptic therapy (e.g., patients with chronic schizophrenia)
Usual Geriatric Dose for Psychosis:
Oral:-Initial dose: 1 to 2.5 mg orally, given in divided doses every 6 to 8 hours-Maintenance dose: 1 to 5 mg/day-Maximum dose: Up to 40 mgComments:-Maintenance doses may be given as a single dose.-Many patients achieve therapeutic effect with doses less than 20 mg.  Patients who are severely disturbed or inadequately controlled may require a dose of up to 40 mg/day.Use: Management of manifestations of schizophrenia
 Detailed Fluphenazine dosage information
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