Sleep Side Effects
Generic Name: diphenhydramine,diphenhydramine hydrochloride,diphenoxylate hydrochloride
Please note - some side effects for Sleep may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.
Side Effects by Body System - for Healthcare Professionals
Nervous system
Nervous system side effects have been reported frequently. These have included depression with drowsiness and sedation in nearly all patients treated. Motor skills may be impaired. Dystonic reactions have been reported after single doses of diphenhydramine.
The CNS depressant effect of diphenhydramine parallels its plasma concentrations. The plasma concentration threshold for sedation is 30 to 42 ng/mL, and to cause mental impairment is 58 to 74 ng/mL. Patients should be warned against driving while taking diphenhydramine.
Dystonic reactions have been accompanied by dizziness, mental confusion, rigidity, lip and tongue protrusion, trismus, torticollis, and swallowing difficulties and generally resolve spontaneously. Toxic encephalopathy has been reported in a child with chicken pox treated generously with topical diphenhydramine.
Delirium has been reported in elderly patients with mild dementia following a small oral dose of diphenhydramine.
Hypersensitivity
Hypersensitivity side effects have included rash, pruritus and eczema. Photosensitivity reactions have also been reported.
Most commonly, hypersensitivity has manifested itself in patients receiving systemic drug after being sensitized to it by topical application. Sensitization with systemic administration has also been reported.
Gastrointestinal
Gastrointestinal side effects have been usually mild and included nausea and dry mouth.
Cardiovascular
Cardiovascular side effects have included hypotension, tachycardia, and palpitations.
Ocular
Ocular side effects have included blurred vision, diplopia, and dry eyes due to anticholinergic effects.
Genitourinary
Genitourinary side effects have included urinary retention and dysuria as a result of the anticholinergic effects of diphenhydramine.
Hematologic
Hematologic side effects such as hemolytic anemia, thrombocytopenia, and agranulocytosis have been rarely caused by antihistamines.
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- Dytuss Elixir MedFacts Consumer Leaflet (Wolters Kluwer)
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