Formula 3® is a mixture of 5 oils. One of the oils, jojoba oil, is the vehicle that holds the drug, tolnaftate 1% USP, in solution (Tetra’s U.S. Patent # 4,810,498). Formula 7® is an oil in water microemulsion. The oil phase is comprised of the jojoba oil with the tolnaftate in solution and tea tree oil to fortify the microemulsion with antifungal, antiseptic, germicidal and anti-bacterial properties. The water phase contains N-acetyl-l-cysteine (NAC) and urea: urea to hydrate, soften, and open keratin for better drug penetration; NAC to increase the flux of tolnaftate through the keratin to the site of involvement and provide bactericidal properties. Formula 7® is clear, paraben free, fortified with bactericidal agents, and packaged in a free-flowing tube for easy application. Both Formula 3® and Formula 7®, like all our products, are dye and fragrance-free.