Antifungal Shampoo for Dogs

Antifungal shampoo for dogs is a medicated treatment designed to combat fungal infections like yeast (Malassezia) and ringworm on canine skin. These specialized shampoos contain active ingredients such as miconazole, ketoconazole, or chlorhexidine that target fungal overgrowth while often addressing secondary bacterial infections.

If your dog has itchy, greasy skin with a musty smell, red patches, or hair loss, an antifungal shampoo can help when yeast or ringworm is involved. These conditions are particularly common in dogs with skin folds, allergies, or compromised immune systems.

Early intervention with the right antifungal treatment can prevent the condition from worsening.

These shampoos use ingredients like miconazole, ketoconazole, or chlorhexidine to reduce fungi and bacteria on the skin. Most medicated shampoos need about 10 minutes of contact time before rinsing to be effective. ^{[2] [5]} The contact time allows the active ingredients to penetrate the skin and work against the fungal organisms.

For prescription-strength treatment in the UK, Malaseb (miconazole + chlorhexidine) is POM‑V and must be prescribed by your vet. For milder overgrowth, a non‑prescription 3% chlorhexidine antiseptic shampoo is often used as part of a vet‑guided plan. ^{[1] [2]} Your vet can help determine which strength and formulation is most appropriate for your dog's specific condition.

For general grooming needs when your dog doesn't have fungal issues, check our guide on the [best shampoos for dog grooming at home](/blog/best-dog-shampoo).

What it treats

1. Yeast dermatitis (Malassezia): very common in dogs; often presents with odor, redness, greasy skin, and itching. ^[2]
2. Ringworm (dermatophytes like Microsporum/Trichophyton): requires vet diagnosis; Malaseb is used under veterinary direction and is prescription-only in the UK. ^[1]
3. Secondary bacterial overgrowth frequently accompanies yeast issues; combination antiseptic/antifungal shampoos are often selected. ^[1]

How it works

1. Chlorhexidine (often 3%) provides broad antiseptic action against bacteria and yeast at the skin surface. ^[2]
2. Miconazole and ketoconazole disrupt fungal cell membranes; evidence supports protocols using 2% miconazole + 2% chlorhexidine, or 3% chlorhexidine alone, with contact times around 10 minutes. ^{[1] [3]}

Signs Your Dog Needs Antifungal Shampoo

Watch for these common symptoms that indicate a fungal skin infection:

✓ Musty, yeasty odour - particularly noticeable around ears, paws, and skin folds ✓ Greasy, oily skin that feels different from normal ✓ Red, inflamed patches - often in warm, moist areas ✓ Excessive scratching or licking - especially paws and ears ✓ Hair loss in circular patches (potential ringworm) ✓ Brown or black discharge from ears ✓ Thickened, elephant-like skin in chronic cases ✓ Recurring skin issues despite regular bathing

If you notice multiple symptoms, consult your vet for proper diagnosis before starting treatment.

Best options (UK‑focused)

1) Malaseb (Prescription only; vet‑directed)

1. Actives: miconazole + chlorhexidine. POM‑V in the UK (vet prescription required). ^[1]
2. Use: Vet protocols typically include full‑body lather and 10‑minute contact before rinsing. ^[1]
3. Notes: Often used for yeast dermatitis and as part of ringworm control, under veterinary guidance. ^[1]

2) DOUXO S3 PYO Shampoo (OTC antiseptic)

1. Actives: chlorhexidine digluconate 3%; clinically shown to reduce yeast to normal levels; also antibacterial. ^[2]
2. Use: Often paired with a leave‑on mousse for prolonged contact; follow product and vet advice. ^[4]
3. Notes: Free of soap, sulphates, parabens, and colorants. ^[2]
4. DOUXO S3 PYO Shampoo available on Amazon

3) Coatex Medicated Shampoo (OTC; supportive care)

1. Profile: Gentle, pH‑neutral, soap‑free; marketed for antibacterial and antifungal action in various skin conditions. ^{[4] [1]}
2. Notes: Used as part of broader management; check label and vet guidance for frequency. ^[4]
3. Coatex Medicated Shampoo available on Amazon

4) Chlorhexidine + Ketoconazole shampoos

1. Example formulation: 1% ketoconazole + 2% chlorhexidine (with acids as stabilisers) is used in some medicated shampoos; availability varies by brand and market—ask your vet which is appropriate. ^{[4] [5]}
2. Chlorhexidine + Ketoconazole shampoos available on Amazon

Quick Comparison Table

Usage guide (simple and safe)

1) Wet the coat with lukewarm water and apply shampoo, working down from the neck and into problem areas (paws, folds). ^[5] 2) Lather to the skin and leave in place for about 10 minutes unless your vet advises otherwise. ^[1] 3) Rinse thoroughly; residue can irritate skin. ^[5] 4) Repeat per label or vet instructions; frequency is typically weekly to twice weekly initially. ^[1]

When to consult a vet

1. Spreading lesions, severe redness, crusting, or no improvement after 2–3 weeks of correct use. ^[2]
2. Recurrent issues (often linked with allergies or other underlying conditions). ^[1]
3. Suspected ringworm in the home (requires diagnosis and an integrated treatment plan). ^[1]

Frequently Asked Questions

How often should I use antifungal shampoo on my dog? Typically 2-3 times per week initially, then reduce to weekly or as directed by your vet. Never use daily unless specifically instructed by a veterinarian.

Can I use antifungal shampoo as a preventive measure? No, antifungal shampoos are treatments, not preventives. Overuse can disrupt your dog's natural skin balance.

Use only when fungal issues are present.

How long does it take to see results? Most dogs show improvement within 1-2 weeks of proper use. If no improvement after 3 weeks, consult your vet for reassessment.

Can I use human antifungal shampoo on my dog? Never use human antifungal products on dogs. They have different pH levels and may contain ingredients toxic to pets.

What if my dog licks the shampoo during the 10-minute contact time? Rinse immediately and contact your vet if large amounts were ingested. Consider using an Elizabethan collar during treatment time.

Should I dilute antifungal shampoo? Only dilute if specifically instructed on the label or by your vet. Most antifungal shampoos are formulated to be used at full strength.

Bottom line

Start with a clear diagnosis and a simple plan: follow label directions, keep to the 10‑minute contact time, and use the right active for the problem. ^[5] For UK owners, Malaseb is prescription‑only; for milder overgrowths your vet may recommend an over‑the‑counter antiseptic option like DOUXO S3 PYO, combined with good rinsing and regular rechecks if signs don't settle. ^{[1] [2]}