AMPROTROPINE (Syntropan) is the phosphate salt of 3 diethylamine, 2.2 dimethylpropanol tropic acid ester. Syntropan is antispasmodic. Its main effect is parasympathetic, and its internal uses are chiefly the same as those of atropine. Syntropan produces relaxation of the tone of the stomach and inhibition of peristaltic activity. The effect of syntropan on gastric secretion excited by a meat extract meal and histamine is weak as compared with atropine. Its advantages as a mydriatic were also described: the rapid effect; the short duration; no general dangers nor discomforts; no local dangers, as damaging the corneal epithelium, or increasing the intraocular pressure; no delay in returning to work for the patient.