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    Perphenazine is used to treat symptoms associated with psychiatric disorders, as well as severe nausea and vomiting in adults. It is in a class of drugs known as phenothiazine neuroleptics.

    Common brand names:


    Summary of Interactions with Vitamins, Herbs, & Foods

    Types of interactions: Beneficial Adverse Check

    Replenish Depleted Nutrients

    • none

    Reduce Side Effects

    • Coenzyme Q10

      Phenothiazine drugs similar to perphenazine can cause changes in heart activity in some people, which might be prevented by supplementing with coenzyme Q10.1 , 2 Therefore, some health practitioners may recommend coenzyme Q10 supplementation to people taking perphenazine.

      The interaction is supported by preliminary, weak, fragmentary, and/or contradictory scientific evidence.

    Support Medicine

    • none

    Reduces Effectiveness

    • none

    Potential Negative Interaction

    • Bacopa

      An animal study found that the effects of chlorpromazine, a drug similar to (perphenazine, prochlorperazine, thioridazine), were enhanced when a bacopa extract was given along with it.3 Until more is known, people taking medications from this family of drugs (called phenothiazines) should not take bacopa.

    Explanation Required 

    • Vitamin C

      Taking phenothiazine drugs can stop menstruation in some women. Two women taking phenothiazines similar to perphenazine began menstruating following supplementation with 6 grams of vitamin C each day.4 Controlled studies are needed to determine whether vitamin C supplementation might benefit women specifically taking perphenazine who are experiencing menstrual changes. Some health practitioners recommend vitamin C supplementation to women who stop menstruating while taking perphenazine. Vitamin C might also enhance the effectiveness of neuroleptic drugs such as perphenazine in the treatment of schizophrenia . One uncontrolled study showed that 10 of 13 individuals experienced a reduction in disorganized thoughts, hallucinations, and suspicious thoughts when 8 grams of vitamin C was added to their daily drug therapy.5 Controlled studies are needed to show whether people taking perphenazine for schizophrenia might benefit from vitamin C supplementation.

      The interaction is supported by preliminary, weak, fragmentary, and/or contradictory scientific evidence.
    The Drug-Nutrient Interactions table may not include every possible interaction. Taking medicines with meals, on an empty stomach, or with alcohol may influence their effects. For details, refer to the manufacturers' package information as these are not covered in this table. If you take medications, always discuss the potential risks and benefits of adding a new supplement with your doctor or pharmacist.


    1. Kishi T, Makino K, Okamoto T, et al. In Yamamura Y, Folkers K, Ito Y, eds. Biochemical and Clinical Aspects of Coenzyme Q, Volume 2. Amsterdam: Elsevier/North Holland Biomedical Press, 1980, 139-57.

    2. Werbach MR. Foundations of Nutritional Medicine. Tarzana, CA: Third Line Press, Inc., 1997, 212.

    3. Ganguly DK, Malhotra CL. Some behavioral effects of an active fraction from Herpestis monniera Linn. (Brahmi). Indian J Med Res 1967;55:473-82.

    4. Kanofsky JD, Kay SR, Lindenmayer JP, Seifter E. Ascorbic acid action in neuroleptic-associated amenorrhea. J Clin Psychopharmacol 1989;9:388-9 [letter].

    5. Beauclair L, Vinogradov S, Riney SJ, et al. An adjunctive role for ascorbic acid in the treatment of schizophrenia? J Clin Psychopharmacol 1987;7:282-3 [letter].

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