Dihydrocodeine / phenylephrine Side Effects
Applies to dihydrocodeine/phenylephrine: oral liquid.
Warning
Do not use this medicine if you have used an MAO inhibitor in the past 14 days. A dangerous drug interaction could occur. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, rasagiline, selegiline, tranylcypromine, and others.
Get emergency medical help if you have any of these signs of an allergic reaction while taking dihydrocodeine / phenylephrine: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Stop using this medicine and call your doctor at once if you have:
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severe dizziness or drowsiness;
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weak or shallow breathing;
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severe restlessness or nervousness;
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severe constipation;
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pounding heartbeats or fluttering in your chest;
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painful or difficult urination; or
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little or no urinating.
Common side effects may include:
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mild drowsiness;
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dryness of your eyes, nose, and mouth;
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blurred vision; or
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects.
For Healthcare Professionals
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
Gastrointestinal side effects have included nausea, vomiting, constipation, abdominal pain, dry mouth, indigestion, anorexia, and spasm of biliary tract.[Ref]
Dermatologic
Dermatologic side effects have included sweating, pruritis, and skin reactions.[Ref]
Renal
Renal side effects have included granulomatous interstitial nephritis and acute renal failure.[Ref]
Cardiovascular
Cardiovascular side effects have included orthostatic hypotension and cardiac palpitations.[Ref]
Respiratory
Respiratory side effects have included cough suppression.[Ref]
Ocular
Ocular side effects have included blurred vision.[Ref]
Hypersensitivity
Hypersensitivity side effects have included anaphylactoid reactions.[Ref]
Genitourinary
Genitourinary side effects have included urinary retention.[Ref]
More about dihydrocodeine / phenylephrine
- Check interactions
- Compare alternatives
- Dosage information
- During pregnancy
- Drug class: upper respiratory combinations
Related treatment guides
References
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.
