Dermasim VT 500 mg is a vaginal tablet containing Clotrimazole 500 mg, manufactured by ACI Limited. It is used for the treatment of vaginal yeast infections (vaginal candidiasis) caused by Candida species. The tablet works by inhibiting the synthesis of ergosterol, an essential component of fungal cell membranes, leading to increased membrane permeability and leakage of essential cellular components, thereby killing the fungus.