For a 50 lb dog, use 0.0015 mg to 0.003 mg of ivermectin per pound of body weight, totaling 75–150 mcg for the dog (1.5–3 mcg/lb × 50 lb).
How much ivermectin can I give my 45 pound dog?
The safe dosage for a 45 lb dog is 67.5–135 mcg of ivermectin (0.0015–0.003 mg per pound) given monthly for heartworm prevention.
Vets and the American Kennel Club agree on this range for preventing heartworms. Need it for mange instead? Those doses run much higher—and you’ll need a vet’s okay. Stick to dog-specific products, too. Livestock formulas? Way off-limits for Fido.
How much ivermectin do you give a dog per pound?
Ivermectin dosage ranges from 0.0015 mg/lb for heartworm prevention to 0.15 mg/lb for skin parasites and 0.1 mg/lb for gastrointestinal worms.
Say your dog weighs 50 lbs. For heartworm, that’s 75 mcg. For mange? A whopping 7.5 mg. Got worms? Try 5 mg. Precision matters—grab a syringe marked in milligrams or milliliters. And whatever you do, skip livestock ivermectin unless your vet says so. Those bottles pack a punch.
How much ivermectin can I give my dog?
The maximum safe oral dose before toxicity risk is 2.5 mg/kg of body weight, which is approximately 1.14 mg per pound.
Hit that limit, and trouble follows. For a 50 lb pup, we’re talking about 56.8 mg. But honestly, most dogs never see doses that high. The Merck Veterinary Manual insists ivermectin only be used under a vet’s watchful eye. Some breeds—Collies, Shelties—are especially sensitive thanks to a wonky gene that messes with drug breakdown.
Can you buy ivermectin over the counter for dogs?
No — ivermectin-based heartworm preventatives like Heartgard are prescription-only medications in the United States.
You’ll find plenty of over-the-counter dewormers out there, but they’re usually loaded with pyrantel or fenbendazole—not ivermectin. The FDA keeps heartworm meds behind the vet’s counter for good reason. Resistance and toxicity risks are real. Get ivermectin products from a licensed vet or a legit pharmacy with a prescription.
How do you give ivermectin tablets to dogs?
Administer ivermectin tablets with or without food, following the prescribed dose based on weight and condition.
Hide it in a treat or use a pill dispenser—just make sure Fido swallows it whole. Liquid versions? Use an oral syringe for accuracy. Crush or split tablets only if your vet gives the green light. Keep these meds locked up tight, away from kids and pets. Accidental overdoses aren’t worth the risk.
How often should I give my dog ivermectin?
Ivermectin is given monthly for heartworm prevention, with repeated doses 14 days apart for mange, and weekly or biweekly for other mite infestations.
Miss a heartworm dose? Your dog’s unprotected. The American Heartworm Society pushes year-round prevention everywhere. Mange treatment? Expect 4–6 weeks of dosing, depending on how your dog responds. Off-label use needs close watching—always follow your vet’s plan.
Can I worm my dog with ivermectin?
Yes, ivermectin is used to treat certain intestinal worms and external parasites in dogs, but it is not effective for all types.
It zaps heartworm microfilariae and some gut worms like roundworms, but tapeworms? Nope. The ASPCA Animal Poison Control Center warns that breeds with the MDR1 gene—Collies, Aussies, and others—can tank hard on ivermectin. Get a fecal test first to know what you’re dealing with.
How much ivermectin do I give a dog with sarcoptic mange?
A dog with sarcoptic mange should receive 300 micrograms of ivermectin per kilogram of body weight.
For a 50 lb (22.7 kg) dog, that’s about 6.8 mg per dose. Plan on repeating it every 7–14 days for 2–4 treatments. Sarcoptic mange is super contagious—even to you—so quarantine the pup and boil those blankets. Oral ivermectin for mange? Off-label, so your vet must sign off after confirming it’s scabies via skin scraping.
How much ivermectin can I give my 60 pound dog?
A 60 lb dog should receive 90–180 mcg of ivermectin for heartworm prevention (1.5–3 mcg per pound).
Need it for mange or worms? Bump the dose to 18 mg for sarcoptic mange or 6 mg for worms. Livestock ivermectin? Dangerously strong. That 1% injectable stuff? One cc holds 10,000 mcg—enough for a 200 lb dog’s yearly heartworm supply. Don’t even think about using it straight.
At what age can you give a dog ivermectin?
Ivermectin should not be given to puppies younger than 6 weeks of age or to dogs without a negative heartworm test.
The AKC suggests starting heartworm prevention at 6–8 weeks, but only after a clean bill of health. Breeds like Collies and Shelties? Get them tested for the MDR1 mutation first. Watch for drooling, tremors, or wobbly steps—classic signs of trouble in sensitive pups.
How much ivomec do I give a dog for mange?
For sarcoptic mange, give 300 mcg/kg; for demodectic mange, give 400–600 mcg/kg.
A 50 lb dog with sarcoptic mange needs about 6.8 mg per dose. Demodectic mange? Try 9–13.6 mg. Repeat every 7–14 days for 3–6 weeks. Demodex cases often drag on and may need extra meds. Both types demand a vet’s diagnosis—don’t guess based on itchy skin alone.
What dog meds have ivermectin?
Prescription heartworm preventatives containing ivermectin include Heartgard, Heartgard Plus, Iverhart Plus, Iverhart MAX, and Tri-Heart Plus.
These chewables come in tasty flavors and are dosed by weight. Heartgard Plus adds pyrantel to tackle roundworms and hookworms. Whipworms and tapeworms? Not on ivermectin’s hit list. Stick to the monthly schedule—skips mean gaps in protection.
Can I take ivermectin for animals?
No — animal ivermectin formulations are not safe or approved for human use.
The U.S. FDA warns animal ivermectin is way too strong for people. Human versions are tightly regulated and only for specific infections like river blindness. Self-medicating with farm-grade stuff? A fast track to poisoning.
Can you give injectable ivermectin orally?
Yes — injectable ivermectin can be given orally to dogs when diluted and measured correctly.
That 1% injectable solution isn’t meant to be chugged straight. Dilute it with propylene glycol or another safe carrier first. Doses must be recalculated based on the new concentration. Never jab livestock ivermectin into your dog—oral use only, and only with a vet’s recipe.
How much ivermectin can you give a dog for worms?
A dog should receive 0.1 mg per pound of body weight as a single dose for gastrointestinal worms.
For a 50 lb dog, that’s 5 mg. Some parasites need a second dose two weeks later. Ivermectin knocks out roundworms and hookworms, but tapeworms and whipworms need different weapons—like praziquantel or fenbendazole. Confirm the invader with a fecal exam before you pick your ammo.
Edited and fact-checked by the FixAnswer editorial team.
