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Brompheniramine

Also indexed as: Dimetane®, Dimetapp® Allergy, Nasahist B®, ND-Stat®, Oraminic II®

Combination drugs: DayQuil® Allergy Relief, Dimetapp®

Brompheniramine is an antihistamine used to relieve allergic rhinitis (seasonal allergy) symptoms including sneezing, runny nose, itching, and watery eyes. It is also used to treat immediate allergic reactions. Brompheniramine is available in nonprescription products alone and in combination with other nonprescription drugs to treat symptoms of allergy, colds, and upper respiratory infections.

Interactions with Herbs

Henbane (Hyoscyamus niger)
Antihistamines, including brompheniramine, can cause “anticholinergic” side effects such as dryness of mouth and heart palpitations. Henbane also has anticholinergic activity and side effects. Therefore, use with brompheniramine could increase the risk of anticholinergic side effects,1 though apparently no interactions have yet been reported with brompheniramine and henbane. Henbane should not be taken except by prescription from a physician trained in its use, as it is extremely toxic.

Interactions with Foods and Other Compounds

Alcohol
Brompheniramine causes drowsiness.2 Alcohol may intensify this effect and increase the risk of accidental injury.3 To prevent problems, people taking brompheniramine or brompheniramine-containing products should avoid alcohol.

Summary of Interactions for Brompheniramine

Depletion or interference None known
Adverse interaction Henbane*
Side effect reduction/prevention None known
Supportive interaction None known
Reduced drug absorption/bioavailability None known

For the convenience of the reader, the information in the summary is categorized as follows: “Depletion or interference” indicates the drug may deplete or interfere with the absorption or function of the supplement or herb. “Adverse interaction” indicates that the supplement or herb used together with the drug may result in undesirable effects. “Side effect reduction/prevention” indicates the supplement or herb may reduce the likelihood and/or severity of a potential side effect caused by the drug. “Supportive interaction” indicates the supplement or herb may support or aid the function of the drug. “Reduced drug absorption/bioavailability” indicates that the supplement or herb may decrease the absorption and/or activity of the drug in the body. An asterisk (*) next to an item in the summary indicates that the interaction is supported only by weak, fragmentary, and/or contradictory scientific evidence.

References:

1. Blumenthal M, Busse WR, Goldberg A, et al, eds. The Complete Commission E Monographs: Therapeutic Guide to Herbal Medicines. Boston, MA: Integrative Medicine Communications, 1998, 146.

2. Threlkeld DS, ed. Respiratory Drugs, Antihistamines. In Facts and Comparisons Drug Information. St. Louis, MO: Facts and Comparisons, May 1998, 192a.

3. Threlkeld DS, ed. Respiratory Drugs, Antihistamines. In Facts and Comparisons Drug Information. St. Louis, MO, Facts and Comparisons, May 1998, 192a.