Discontinue use if acute generalized exanthematous pustulosis occurs. Not to be used in patients w/ swallowing difficulties, upper GI narrowing or abnormal esophageal peristalsis. HTN, DM, ischemic heart disease, increased IOP, hyperthyroidism, prostatic hypertrophy; CNS stimulation w/ convulsions or CV collapse w/ accompanying hypotension. Discontinue use approx 48 hr prior to skin testing. Avoid abrupt w/drawal. Hepatic insufficiency. Pregnancy & lactation. Childn <12 yr.