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Phenylephrine HD Side Effects

Generic Name: hydrocodone / phenylephrine

Note: This document contains side effect information about hydrocodone / phenylephrine. Some of the dosage forms listed on this page may not apply to the brand name Phenylephrine HD.

Applies to hydrocodone/phenylephrine: oral liquid, oral syrup

Nervous system

Nervous system side effects have included drowsiness, nervousness, insomnia, and headache.[Ref]


Gastrointestinal side effects have included nausea and constipation.[Ref]


Respiratory side effects have included respiratory depression.[Ref]


Psychiatric side effects have included addiction.[Ref]


General side effects have included lassitude,and giddiness,[Ref]


Genitourinary side effects have included urinary retention in patients with prostatic hypertrophy.[Ref]


1. "PDR Generics. 4th ed." Montvale, NJ: Medical Economics (1998):

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.

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