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Compro and Ismelin

Determining the interaction of Compro and Ismelin and the possibility of their joint administration.

Check result:
Compro <> Ismelin
Relevance: 28.10.2022 Reviewer: Shkutko P.M., M.D., in

In the database of official manuals used in the service creation an interaction registered by statistical results of studies was found, which can either lead to negative consequences for the patient health or strengthen a mutual positive effect. A doctor should be consulted to address the issue of joint drug administration.

Consumer:

Ask your doctor before using prochlorperazine together with guanethidine. Taking these medicaions together can make guanethidine less effective. You may need a dose adjustment or need your blood pressure checked more often if you use both medications. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Professional:

GENERALLY AVOID: Phenothiazines may inhibit the antihypertensive effect of guanethidine, probably through inhibition of guanethidine neuronal uptake. No data are available for guanadrel, but a similar interaction is suspected. Other adrenergic neurone blockers may also interact.

MANAGEMENT: This combination should generally be avoided. An alternative antihypertensive regimen may be necessary for patients who must take phenothiazine antipsychotics. If patients do receive a phenothiazine with an adrenergic neurone blocker, their blood pressure should be monitored closely. The dosage of the antihypertensive may require adjustment.

References
  • Gilder DA, Fain W, Simpson LL "A comparison of the abilities of chlorpromazine and molindone to interact adversely with guanethidine." J Pharmacol Exp Ther 198 (1976): 255-63
  • Markowitz JS, Wells BG, Carson WH "Interactions between antipsychotic and antihypertensive drugs." Ann Pharmacother 29 (1995): 603-9
  • Janowsky DS, El-Yousef MK, Davis JM, Fann WE "Antagonism of guanethidine by chlorpromazine." Am J Psychiatry 130 (1973): 808-12
  • Fann WE, Janowsky DS, Davis JM, Oates JA "Chlorpromazine reversal of the antihypertensive action of guanethidine." Lancet 2 (1971): 436-7
Compro

Generic Name: prochlorperazine

Brand name: Compro, Compazine

Synonyms: Compro (rectal)

Ismelin

Generic Name: guanethidine

Brand name:

Synonyms: Ismelin (Oral)

In the course of checking the drug compatibility and interactions, data from the following reference sources was used: Drugs.com, Rxlist.com, Webmd.com, Medscape.com.

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