<p>In adults somnolence, tachycardia and headache have been reported with overdose greater than 10 mg. Extrapyramidal signs and palpitations have been reported in children with overdoses of greater than 10 mg. In the event of overdosage, general symptomatic and supportive measures should be instituted promptly and maintained for as long as necessary. It would seem reasonable to treat patients presenting early after large overdoses with oral activated charcoal. The conscious patients may be induced to vomit or gastric lavage may be performed.</p>