Here's what rhymes with sympathomimetic.

Consider these alternatives

anticholinergic / cholinergic antiinflammatory / story antitumor / tumor antimuscarinic / scenic quinidine / seen chemotherapeutic / therapeutic antihypertensive / extensive oxazepam / can azathioprine / line inotropic / logic vasoactive / attractive piperidine / seen theophylline / seen emulsifying / dying