Resorcinol, Resorcin. This chemical was originally derived from natural resins and used internally as an antiseptic in doses of 2 to 5 gr., and as an antipyretic in 15 to 20 gr. doses, and was a valuable drug. The present U. S. P. drug is made synthetically, and the average dose is given as 2 gr. Large doses are dangerously depressing. Since the drug is so changed, it is very much open to question whether it presents any advantages over phenol. Externally, it is more convenient, probably, and is used in 5 to 30% solution or ointment in various skin diseases and gonorrhea. It has a large list of incompatibles.