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Alahist DHC Side Effects

Generic Name: dihydrocodeine / phenylephrine

Note: This page contains information about the side effects of dihydrocodeine / phenylephrine. Some of the dosage forms included on this document may not apply to the brand name Alahist DHC.

Applies to dihydrocodeine / phenylephrine: oral liquid

Nervous system

Nervous system side effects have included light-headedness, dizziness, drowsiness, headache, fatigue, sedation, confusion, hallucinations, vivid dreams, severe narcosis, lassitude, giddiness, increased irritability, and excitement.[Ref]


Gastrointestinal side effects have included nausea, vomiting, constipation, abdominal pain, dry mouth, indigestion, anorexia, and spasm of biliary tract.[Ref]


Dermatologic side effects have included sweating, pruritis, and skin reactions.[Ref]


Renal side effects have included granulomatous interstitial nephritis and acute renal failure.[Ref]


Cardiovascular side effects have included orthostatic hypotension and cardiac palpitations.[Ref]


Respiratory side effects have included cough suppression.[Ref]


Ocular side effects have included blurred vision.[Ref]


Hypersensitivity side effects have included anaphylactoid reactions.[Ref]


Genitourinary side effects have included urinary retention.[Ref]


1. "Product Information. Alahist DHC (dihydrocodeine-phenylephrine)." Poly Pharmaceuticals Inc, Quitman, MS.

Not all side effects for Alahist DHC may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.

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