Onabet Lotion contains Sertaconazole 2% w/v, an effective antifungal agent indicated for the treatment of superficial fungal infections of the skin. Sertaconazole belongs to the imidazole class of antifungals and exhibits broad-spectrum activity against dermatophytes, yeasts, and some gram-positive bacteria. The mechanism of action involves inhibition of ergosterol synthesis, a vital component of fungal cell membranes, leading to increased membrane permeability and ultimately fungal cell death. Onabet Lotion is primarily used in the management of conditions such as tinea corporis, tinea cruris, tinea pedis, and candidiasis of the skin. It is applied topically to the affected area once or twice daily, depending on the severity of the infection, and treatment duration typically ranges from two to four weeks. The formulation ensures good skin penetration and minimal systemic absorption, reducing the risk of systemic side effects. Common adverse reactions may include mild local irritation, burning sensation, or itching at the application site, which are generally transient. Onabet Lotion should be used with caution in patients with known hypersensitivity to Sertaconazole or other imidazole derivatives. It is contraindicated in open wounds or mucosal surfaces unless specifically directed by a healthcare professional.