At times, patients have allergic reactions to blood or plasma transfusions they receive. A doctor may put the patient on periactin because it improves a patient's reaction to this type of allergy.
Follow the dosage amount recommended by your doctor. On average, your physician will likely recommend you take between 12 mg to 16 mg of the medicine each day. However, the therapeutic range for adults is anywhere from 4 mg to 20 mg daily. Pediatric patients will be given between 2 mg to 4 mg of the drug daily to control symptoms.
Periactin has been used by some doctors as an appetite stimulant to help underweight individuals gain weight. This indication has not yet been approved by the U.S. Food and Drug Administration.
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