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Alahist DHC Side Effects

Generic name: dihydrocodeine / phenylephrine

Note: This document contains side effect information about dihydrocodeine / phenylephrine. Some dosage forms listed on this page 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 (2008):

Further information

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.