I have a 26 year old son with down's syndrome (primary) and pdd. recently he's having intermittent explosive episodes. what medicine would help him?

IED: Generally, ied, intermittent explosive disorder, is a syndrome with several causes. Your son has a condition prone to ied. Meds that help include beta blockers, anticonvulsants/mood stabilizers/ and antipsychotics or benzodiazepines. They all are effective in the right patient. Work with his md to figure out particular triggers, that will guide drug selection. Low blood sugar may be an issue, too.

People who have : Intellectual Disability from any cause have a higher incidence of psychiatric disorders than does the general population. That said, those with communication difficulties may act out to signal pain or reaction to an environmental change. Obtain a detailed history of onset, frequency & precipitants of the outbursts & a have a thorough physical exam done before considering psychotropic medications.