Duohist DH Side Effects
Generic Name: chlorpheniramine / dihydrocodeine / phenylephrine
Note: This document contains side effect information about chlorpheniramine / dihydrocodeine / phenylephrine. Some of the dosage forms listed on this page may not apply to the brand name Duohist DH.
General side effects including light-headedness, dizziness, drowsiness, headache, fatigue, and sedation have been among the most frequently reported with opioid use. Confusion, abdominal pain, lassitude, giddiness, increased irritability or excitement (especially in children) have been reported. Hallucinations, severe narcosis, and vivid dreams have been reported rarely.[Ref]
Gastrointestinal side effects including nausea, vomiting, and constipation have been among the most frequently reported with opioid use. Diarrhea, dry mouth, indigestion, anorexia, spasm of biliary tract have been reported.[Ref]
Other side effects of dihydrocodeine have included psychological dependence, physical dependence, and tolerance have been reported to develop upon repeated administration.[Ref]
Renal side effects including granulomatous interstitial nephritis and acute renal failure have been reported rarely during dihydrocodeine administration.[Ref]
Ocular side effects including miosis and blurred vision have been reported.[Ref]
Hypersensitivity side effects including anaphylactoid reactions have been reported rarely.[Ref]
1. "Product Information. Pancof-PD (chlorpheniramine / dihydrocodeine / phenylephrine)." Pamlab LLC, Mandeville, LA.
Some side effects may not be reported. You may report them to the FDA.