Topical Antimicrobials for Canine Skin and Ears: Top 7 Prescription Options in the USA for 2026

Surolan is a long-established prescription otic formulation that combines antifungal, antibacterial and anti-inflammatory activity in a single suspension, making it a go-to for mixed bacterial and yeast ear infections in dogs. It holds its position by offering a broad spectrum of coverage with a polymyxin-based antibacterial component that clinicians often prefer for gram-negative pathogens, and it is frequently seen as a cost-effective alternative to some proprietary gentamicin-based ear ointments on the market.

Otomax is a market-leading prescription ear ointment known for its potent gentamicin + clotrimazole + corticosteroid combination and an ointment vehicle that adheres well in the ear canal, useful for stubborn otitis externa. As a Zoetis product it is often priced at a premium relative to some competitors, but many clinicians select it for its proven clinical track record and strong antibacterial potency where aggressive therapy is indicated; compared with Surolan and Mometamax, practitioners weigh its efficacy against potential ototoxicity concerns if the tympanic membrane is compromised.

Mometamax is a prescription otic suspension combining antibacterial and antifungal agents with mometasone, a potent topical steroid, delivering strong anti-inflammatory control for severe or highly inflamed ear disease. It occupies a clinical niche similar to Otomax but with a different steroid profile—many veterinarians favor mometasone for its potency and dosing characteristics—offering a technically distinct option that can be cost-competitive depending on regional availability.

Osurnia Otic Gel is a prescription, veterinarian‑applied, sustained‑release otic formulation combining antibiotic, antifungal and corticosteroid ingredients to treat canine otitis externa; its single‑visit, long‑residence gel design improves compliance and targets multi‑pathogen ear infections. Technically optimized for the ear canal with prolonged local exposure, it stands out from simple topical antibiotics by addressing inflammation and fungal co‑infections at once; financially it often carries a higher per‑dose cost but can lower total treatment and follow‑up expenses by reducing the need for daily owner administration.

Malaseb is a prescription therapeutic shampoo designed for generalized canine skin infections, combining broad-spectrum antiseptic and antifungal activity to manage bacterial pyoderma and Malassezia dermatitis over large body areas. Its financial and practical advantages come from treating widespread disease with a single topical product rather than multiple localized therapies; compared with mousse or otic products on this list, Malaseb is best suited for whole-body therapy and maintenance baths rather than targeted ear or fold applications.

Douxo S3 PYO Mousse is a prescription topical mousse that targets pyoderma with antibacterial actives plus a skin-barrier supporting ingredient (Ophytrium), providing a convenient, low-mess option for focal skin infections and difficult-to-treat skin folds. It stands out for its user-friendly vehicle and emphasis on barrier repair and owner compliance, often commanding a higher unit price than traditional shampoos but offering technical advantages in ease of application and reduced treatment time for localized disease compared with whole-body shampoos or ear-specific suspensions.