Usual adult dose, initial: intramuscular or subcutaneous, 12.5 to 25 mg (0.5 ml to 1 ml), the dose being repeated or increased every one to three weeks as needed and tolerated.
Maintenance: intramuscular or subcutaneous, usually up to 50 mg every one to four weeks, as needed and tolerated. For dose more than 50 mg, increases should be made cautiously in increments of 12.5 mg. Maximum: 100mg / dose.