FIVE TO 10 ML OF A SUSPENSION CONTAINING 2.5% OF SELENIUM SULFIDE IS APPLIED TO THE WET SCALP; THE HAIR IS RINSED AND THE APPLICATION REPEATED; THE SUSPENSION SHOULD REMAIN IN CONTACT WITH THE SCALP FOR 2 TO 3 MINUTES EACH TIME. THE HAIR SHOULD BE WELL RINSED AFTER THE TREATMENT AND ALL TRACES OF THE SUSPENSION REMOVED FROM THE HANDS AND NAILS. APPLICATIONS ARE USUALLY MADE TWICE WEEKLY FOR 2 WEEKS, THEN ONCE WEEKLY FOR 2 WEEKS AND THEN ONLY WHEN NECESSARY. SHAMPOOS CONTAINING 1% ARE ALSO USED.
SELENIUM SULFIDE IS ALSO USED AS A 2.5% LOTION IN THE TREATMENT OF PITYRIASIS VERSICOLOR (SEE SKIN INFECTIONS, ). THE LOTION MAY BE APPLIED TO THE AFFECTED AREAS WITH A SMALL AMOUNT OF WATER AND ALLOWED TO REMAIN FOR 10 MINUTES BEFORE THOROUGH RINSING. THIS PROCEDURE IS REPEATED ONCE DAILY FOR ABOUT 7 DAYS. ALTERNATIVELY UNDILUTED 2.5% LOTION HAS BEEN APPLIED AT BEDTIME AND WASHED OFF IN THE MORNING ON 3 SEPARATE OCCASIONS AT 3-DAY INTERVALS.