If you are:
Precaution: USE IS NOT RECOMMENDED. MAY CAUSE UNUSUAL EXCITEMENT OR IRRITABILITY.
An adult over 60:
management or monitoring precaution: Neuro/Psych-Anticholinergic effects may cause sedation, worsen cognitive impairment and increase fall risk. Cardiovascular-May cause orthostatic hypotension at higher doses. Gastrointestinal-May cause or worsen pre-existing constipation. Genitourinary-Best avoided in patients with urinary retention from any cause.
Giving dimenhydrinate to a child under 12:
Contraindication: No safety and efficacy age <2 years. CNS excitation and seizure risk in newborns.