Carbetapentane / diphenhydramine / phenylephrine Side Effects
Applies to carbetapentane/diphenhydramine/phenylephrine: oral suspension extended release, oral tablet chewable extended release, oral tablet extended release
Nervous system side effects have included sedation, sleepiness, dizziness, disturbed coordination, fatigue, confusion, restlessness, excitation, nervousness, tremor, irritability, insomnia, euphoria, paresthesias, vertigo, tinnitus, acute labyrinthitis, headache, neuritis, and convulsions,[Ref]
Ocular side effects have included diplopia and blurred vision.[Ref]
Respiratory side effects have included thickening of bronchial secretions, tightness of chest or throat, wheezing, and nasal stuffiness.[Ref]
1. "Product Information. Dytan CS (carbetapentane / diphenhydramine / phenylephrine)." Hawthorn Pharmaceuticals, Madison, MS.
Some side effects may not be reported. You may report them to the FDA.