Piperonal - Heliotropin. - Obtained from piperic acid by oxidation. It occurs in small white crystals, soluble in about 600 parts of cold water, and very readily soluble in alcohol and ether. The dose is 10-15 grains (0.6-1.0 Gm.). It has been used as an antiseptic and antipyretic.

Physiological Action and Therapeutics of pepper and its preparations are almost identical with those of capsicum.

Pepper, particularly piperin, possesses antiperiodic and antiseptic properties to a greater extent than capsicum.