Endal HD Side Effects

Generic Name: diphenhydramine / hydrocodone / phenylephrine

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

Applies to diphenhydramine / hydrocodone / phenylephrine: oral suspension extended release, oral syrup

Nervous system

Nervous system side effects have included lightheadedness, nervousness, dizziness, drowsiness, sedation, mental clouding, headache, insomnia, tremors, weakness, lethargy, hallucinations, convulsions, impairment of mental and physical performance, anxiety, fear, dysphoria, psychic dependence, itchy and prickly sensations, and mood changes.^[Ref]

Gastrointestinal

Gastrointestinal side effects have included difficulty swallowing, dry mouth, anorexia, nausea, vomiting, and heartburn.^[Ref]

Genitourinary

Genitourinary side effects have included ureteral spasm, spasm of vesicle sphincters, urinary retention, and dysuria.^[Ref]

Cardiovascular

Cardiovascular side effects have included pallor, tachycardia, palpitations, irregular heart beat, arrhythmias and cardiovascular collapse with hypotension.^[Ref]

Respiratory

Respiratory side effects have included respiratory difficulty and shortness of breath.^[Ref]

Ocular

Ocular side effects have included blurring of vision.^[Ref]

Dermatologic

Dermatologic side effects have included rare reports of dermatitis.^[Ref]

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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