Use code ONREPEAT at checkout for 65% off up to $65 on Auto-Refill Orders.

Use code DOGDAY40 at checkout for $40 off your next order over $100.*

*Coupon terms and conditions: code DOGDAY40 applicable for one-time or Subscribe & Save orders, for a limited time. Coupon codes apply to many, but not all, products. 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 August 23, 2026.

Use code DOGDAY60 at checkout for $60 off your next order over $200.*

*Coupon terms and conditions: code DOGDAY60 applicable for one-time or Subscribe & Save orders, for a limited time. Coupon codes apply to many, but not all, products. 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 August 23, 2026.

Now Available on Koala: Royal Canin Vet Fresh Frozen Diets! Use code FRESH50 at checkout for 50% off your first Subscribe & Save order.*

*Coupon terms and conditions: code FRESH50 applicable for first-time Subscribe & Save orders only. Coupon code applies to the following products: Royal Canin Appetite Stimulation Fresh Frozen Dog Food, Royal Canin Gastrointestinal Low Fat Fresh Frozen Dog Food, and Royal Canin Selected Protein Pork Recipe Fresh Frozen Dog Food. Promotional code valid through December 31, 2026.

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Allergy relief and medicine for dogs, from antihistamines to prescription treatments. Vet-approved care delivered by Koala Health.

Allergy Relief & Medicine for Dogs

allergy relief

Oclacitinib (Apoquel) is used to relieve itching due to a variety of causes including allergy.

Apoquel

Apoquel Chewable

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

Atopica for Dogs

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

Calmatrol

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

Dexamethasone is a steroid used to treat immune-mediated and inflammatory conditions.

Dexamethasone

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

Diphenhydramine Capsule

Diphenhydramine Tablet

DOUXO S3 CALM Mousse is a leave-in product used to manage itch and inflammation associated with allergic skin conditions.

Douxo S3 CALM Mousse

DOUXO S3 CALM shampoo is a soap-free shampoo used to manage itch and inflammation associated with allergic skin conditions.

Douxo S3 CALM Shampoo

Triamcinolone (Gensis) is a steroid used to treat inflammatory conditions, especially allergy and skin disorders.