Clotrimazole in Otomax Suspension is a broad spectrum antifungal used to treat fungal infections of the skin. Betamethasone in Otomax Suspension is a synthetic corticosteroid that works as an effective anti-inflammatory by blocking the production of inflammatory chemicals like prostaglandins and leukotrienes also cyclooxygenase (COX 1 and COX 2), the enzymes specifically involved in prostaglandin production. It works by inhibiting bacterial protein synthesis, which prevents the bacteria from producing important proteins needed to grow and kills the bacteria. Gentamicin sulphate in Otomax Suspension is an aminoglycoside antibiotic and is effective against a wide range of susceptible bacteria that can cause ear infection in dogs. Otomax Suspension contains three medications for topical treatment of ear infection and inflammation in dogs. Otomax Suspension is also effective for treating inflammation that is caused by the infection and helps relieve symptoms including itching, discomfort, redness and swelling. Otitis externa is an infection of the outer ear that is caused by fungi and/or bacteria. Otomax Suspension is a combination medication used as a topical treatment for chronic and acute otitis externa in dogs.