Silka is a topical antifungal cream-based medicine with an advanced formula that starts to work on the first day. Recover your confidence while doing your daily activities with this 7-day treatment for athletes foot. Complete cure may take several weeks. Full strength with 1% Terbinafine HCl to cure most Athletes Foot infections. It Starts to work on the first day. Works 4x faster versus 4-week treatments (Comparison of 1-week Silka treatment versus 4-week over-the-counter treatments). Cures most athlete’s foot (tinea pedis), jock itch (tinea cruris) and ringworm (tinea corporis).