Herbal Prescription Shampoo Analgesic Ant- inflammatory anti bacterial, fights fleas. E-Z Groom’s Herbal Prescription Flea Season Shampoo, employs nature’s own defenses, blended with a gentle coconut based cleanser, to combat problems caused by fleas, ticks and other insects. Herbal Prescription combines natural oils of Orange and Sesame with natural extracts of Pennyroyal and Meadowsweet. May be used on cats 4:1 Conc.