7 DIFFERENT VEHICLES 1 BEST-SELLING BRAND. * Acne, Rosacea, Seborrheic Dermatitis. My family has it all. Thankfully, so does AVAR.® The AVAR®line of products provides safe and effective treatment of seborrheic dermatitis (SD), acne vulgaris (AV), and acne rosacea (AR). AVAR®products contain sodium sulfacetamide, a sulfonamide antibiotic. The 1 Branded Sodium Sulfacetamide Treatment on the Market † The AVAR®line of products provides safe and effective treatment of seborrheic dermatitis (SD), acne vulgaris (AV), and acne rosacea (AR). AVAR®products contain sodium sulfacetamide, a sulfonamide antibiotic.