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

✨ FOURTH OF JULY SALE: Use code JULY35 at checkout for 35% off up to $35 on your next order.* ✨

*Coupon terms and conditions: JULY35 valid for first-time orders over $20, not limited to Autoship. 35% off up to $35. 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 July 6, 2026.

🎆 FOURTH OF JULY SALE: Use code JULY50 at checkout for 50% off up to $50 on your next Autoship order.* 🎆

*Coupon terms and conditions: code JULY50 applicable for auto-refill orders only, 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 July 6, 2026.

Allergy Relief

Antibiotics

Anxiety, Behavior & Stress

Arthritis, Pain & Joint Health

Dental

Dewormers & Parasiticides

Diabetes & Insulin

Digestive & Gastrointestinal

Ear Care

Eye Care

Flea & Tick

Food

Heart & Blood Pressure

Heartworm

Immune Support

Respiratory Care & Asthma

Seizure & Epilepsy

Skin & Coat

Thyroid & Hormone

Urinary Tract & Kidneys

Vitamins & Supplements

All Cat Food

Dry Food

Treats

Veterinary Diets

Wet Food

All Dog Food

Buy diabetes medicine and insulin for cats. Trusted brands, vet-approved treatments, and fast delivery from Koala Health.

Buy Diabetes Medicine & Insulin for Cats

diabetes & insulin

Insulin Syringes/Needles U-100 are used for the injection of U-100 (100 units per ml) insulin in pets with diabetes. These syringes do not contain 1/2 unit markings.

UltiCare VetRx U-100 Syringes - 12.7mm x 28G

UltiCare VetRx U-100 Syringes - 12.7mm x 29G

Insulin Syringes/Needles U-100 are used for the injection of U-100 (100 units per ml) insulin in pets with diabetes. These syringes contain 1/2 unit markings.

UltiCare VetRx U-100 Syringes with Half Unit Marks - 8mm x 31G

Insulin Syringes/Needles U-40 are used for the injection of U-40 (40 units per ml) insulin in pets with diabetes. These syringes do not contain 1/2 unit markings.

UltiCare VetRx U-40 Syringes & Sharps Container - 12.7mm x 29G

UltiCare VetRx U-40 Syringes - 12.7mm x 29G

Insulin Syringes/Needles U-40 are used for the injection of U-40 (40 units per ml) insulin in pets with diabetes. These syringes contain 1/2 unit markings.

UltiCare VetRx U-40 Syringes with Half Unit Marks & Sharps Container - 12.7mm x 29G

UltiCare VetRx U-40 Syringes with Half Unit Marks - 12.7mm x 29G

An insulin kit that comes with an automatic insulin delivery pen, a travel pouch, a needle remover, a dose selector adaptor, a release button extension and instructions for accurate insulin administration. 

Vetpen Starter Kit

Vetsulin (porcine insulin zinc suspension) is the first and only FDA-approved insulin for the treatment of diabetes in dogs and cats.