Dimetane Extentab Side Effects
Generic name: brompheniramine
Note: This document contains side effect information about brompheniramine. Some dosage forms listed on this page may not apply to the brand name Dimetane Extentab.
Applies to brompheniramine: compounding powder, injectable solution, oral capsule, oral capsule extended release, oral liquid, oral suspension extended release, oral tablet, oral tablet chewable extended release, oral tablet extended release.
Nervous system side effects have included central nervous system (CNS) depression, resulting in drowsiness and sedation in nearly 50% of patients treated. This effect has often been transient and ceased with continued use. Motor skills have be impaired and patients should be advised to avoid tasks which require attention. Patients should also avoid concomitant use with alcohol and other sedative-hypnotic drugs. Dyskinesias have rarely been reported following chronic use of brompheniramine (the active ingredient contained in Dimetane Extentab) [Ref]
A few cases of dyskinesias and tremors, often of the face, have been reported in patients whose chronic use of brompheniramine extended over a period of up to 10 years. Some of these cases were only partially relieved by discontinuation of the drug. Haloperidol was successful in relieving symptoms in these patients. Spasmodic torticollis has been reported in a child given brompheniramine over an eight month period.[Ref]
Ocular side effects have included blurred vision, diplopia, and dry eyes due to anticholinergic effects.[Ref]
More about Dimetane Extentab (brompheniramine)
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- During pregnancy
- Drug class: antihistamines
Related treatment guides
1. Simons FE, Frith EM, Simons KJ "The pharmacokinetics and antihistaminic effects of brompheniramine." J Allergy Clin Immunol 70 (1982): 458-64
2. Thach BT, Chase TN, Bosma JF "Oral facial dyskinesia associated with prolonged use of antihistaminic decongestants." N Engl J Med 293 (1975): 486-7
3. Schuller DE, Turkewitz D "Adverse effects of antihistamines." Postgrad Med 79 (1986): 75-86
4. Blamoutier J "Comparative trial of two antihistamines, mequitazine and brompheniramine." Curr Med Res Opin 5 (1978): 366-70
5. Lewith GT, Davidson F "Dystonic reactions to Dimotapp elixir." J R Coll Gen Pract 31 (1981): 241
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Some side effects may not be reported. You may report them to the FDA.