Heartworm Prevention for Cats

Heartworm

Why heartworm prevention is important

Heartworm disease is a serious and potentially fatal condition in cats. Spread by mosquitoes, heartworm can damage the lungs and heart—even a small number of worms can cause severe illness. Preventative treatment is the only safe and effective way to protect your cat.

How cats get heartworm

Cats become infected when bitten by a mosquito carrying heartworm larvae. Unlike dogs, cats are not natural hosts, so even a single worm can cause inflammation and respiratory issues. There's no reliable treatment for heartworm in cats, which is why prevention matters so much.

Signs of heartworm in cats

Symptoms can include coughing, vomiting, lethargy, and breathing difficulty. In some cases, heartworm can cause sudden collapse or death with no warning. Many cats show no obvious signs, making regular prevention even more critical.

Preventative treatment options

Heartworm preventatives are usually given monthly and come in spot-on or oral form. Products like Revolution Plus and Advocate provide heartworm protection along with defence against fleas, ticks, and worms. Always follow the dosage directions based on your cat's weight.

Year-round protection is best

Because heartworm is spread by mosquitoes, and mosquitoes can be active all year in many parts of Australia, consistent monthly prevention is strongly recommended. Missing even one dose can leave your cat at risk.

Frequently asked questions

Can heartworm in cats be cured?

No. There is no approved treatment for heartworm in cats, so prevention is the safest option.

Do indoor cats need heartworm prevention?

Yes. Mosquitoes can enter homes, so indoor cats are still at risk of heartworm infection.

How often should I give heartworm prevention?

Most products are monthly. Stick to a regular schedule to maintain full protection.

Is a blood test required before starting prevention?

Not usually for cats, but check with your vet, especially if doses have been missed.

Which products protect against heartworm in cats?

Trusted options include Revolution Plus and Advocate, both offering broad parasite protection.