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*Coupon terms and conditions: code SAVINGS35 applicable for one-time or Subscribe & Save orders over $20. Product exclusions apply. Excluded products include but are not limited to Azodyl, Bravecto, Bravecto Plus, Droncit, Incurin, Mometamax, Numelvi, Optimmune, Posatex, Sentinel, Tri-Heart Plus, VetPen, Vetsulin, compounded and refrigerated medications. Promotional code valid through September 7, 2026.

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Immune support supplements for cats to help strengthen natural defenses. Trusted care from Koala Health.

Immune Support for Cats

immune support

Cyclosporine (Atopica) is used to suppress the immune system to treat allergic skin and immune-mediated conditions.

Atopica for Cats

Azathioprine is used to suppress the immune system to treat immune-mediated conditions.

Azathioprine

Cyclosporine (Cyclavance) is used to suppress the immune system to treat allergic skin and immune-mediated conditions.

Cyclavance

Cyclosporine is used to suppress the immune system to treat allergic skin and immune-mediated conditions.

Cyclosporine

Mycophenolate is used to suppress the immune system to treat immune-mediated conditions.

Mycophenolate

Prednisone and prednisolone (PrednisTabs) are steroids used to treat a wide variety of dog and cat illnesses including inflammatory conditions, immune-mediated diseases, certain cancers, and Addison's disease (hypoadrenocorticism).

PrednisTabs

Purina® Pro Plan® Veterinary Supplements FortiFlora® SA Synbiotic Action contains a powerful combination of probiotics and prebiotics to support your cat’s GI health, with probiotics to nourish your cat’s gut and prebiotic fiber to support a healthy microbiome.

Purina Pro Plan FortiFlora PRO Synbiotic Action Probiotic Supplement for Cats

Probiotics supply "good" bacteria to the gut and promote overall digestive health.

Purina Pro Plan FortiFlora Probiotic for Cats

Diphenhydramine (Vetadryl) is an antihistamine used to treat allergic reactions and itchiness due to allergies.

Vetadryl

Lysine (Viralys) is an amino acid supplement used as an antiviral agent in cats.