Here's what rhymes with physostigmine.

Consider these alternatives

selegiline / seen dapsone / shown primidone / pyrimidone hydroxyzine / seen theophylline / seen scopolamine / mean acetylcysteine / line phenobarbital / phenobarbitol bupropion / utopian phenacetin / meeting ganciclovir / will valproic / heroic atropine / line acetylcholinesterase / case isotretinoin / join infliximab / that quinidine / seen flumazenil / feel metronidazole / holy itraconazole / whole