Stud 100 Desensitizing Spray For Men contains Lidocaine USP 9.6% w/w (approx. 10mg per metered dose), which acts as a topical desensitizer and local anesthetic. The Stud delay spray helps to temporarily slow down the onset of ejaculation by reducing sensitivity of the penis in advance of intercourse. According to the product labeling, individuals can apply 3–10 sprays approximately 5–15 minutes before intercourse. The other ingredients are Isopropyl Myristate, Stearic Acid, 2-(2-Ethoxyethoxy)ethanol and fragrance. Developed in 1970, STUD 100 helps reduce sensitivity in men experiencing premature or over-rapid ejaculation. STUD 100 desensitizer spray meets the requirements outlined by the FDA's Monograph on Male Genital Desensitizers.