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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Digestive and stomach medicine for dogs to support gut health and digestion. Shop vet-approved options at Koala Health.

Digestive & Stomach Medicine for Dogs

digestive & gastrointestinal

Maropitant (Cerenia) is used to treat vomiting and prevent motion sickness and can be used to treat coughing.

Cerenia

Clonidine is a prescription medication that may be prescribed for diarrhea in the treatment of inflammatory bowel disease. It can also be used for treating certain behavioral disorders in dogs such as phobias, aggression, and separation anxiety.

Clonidine

Maropitant is used to treat vomiting and prevent motion sickness and can be used to treat coughing.

Comfor-trate

Cyproheptadine is a medication used as an appetite stimulant.

Cyproheptadine

Capromorelin (Entyce) is an appetite stimulant.

Entyce

Pancreatic enzymes (Epizyme Powder) are used in conditions like exocrine pancreatic insufficiency, in which the body does not supply its own digestive enzymes.

Epizyme Powder

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

EZ-Soothe Probiotic

Famotidine is an antihistamine used to reduce stomach acid production.

Famotidine

Lactulose is a medication prescribed to treat constipation and brain dysfunction caused by liver disease.

Lactulose

Lax'aire is a gentle laxative and lubricant in a palatable ointment approved for use in dogs and cats.

Lax'aire

Maropitant

Methylprednisolone is a steroid used to treat inflammatory conditions, especially allergy and skin disorders.