Here's what rhymes with barbiturate.

Consider these alternatives

overdose / close phenobarbital / phenobarbitol benzodiazepine / diazepine anesthetic / magnetic chloral / moral pentobarbital / secobarbital aconitine / been albuterol / pirbuterol glucocorticoids / cocorticoids rifampicin / horizon levothyroxine / thyroxine diazepam / can oxycodone / known salicylate / late hydromorphone / dihydromorphone