🐶 Ticks Are Dangerous — But Can Tick Medicines Be Dangerous Too?
Protect your dog from fleas and ticks safely. Learn how oral flea and tick medicine for dogs works, common side effects, safety tips, overdose risks, and when these chewable treatments may become dangerous. Discover vet-approved prevention options and warning signs every pet owner should know.
But here’s the truth: Not all oral pesticides are harmless, and misuse can sometimes be more dangerous than ticks themselves.
🦠 What Are Oral Tick Pesticides?
These are chewable or oral medications designed to kill ticks and fleas after the parasite bites your dog.
Common veterinary-approved oral flea and tick medicine for dogs:
Fluralaner (Bravecto)
Afoxolaner (NexGard)
Sarolaner (Simparica)
Lotilaner (Credelio)
📌 How They Work:
These medicines affect the nervous system of ticks and fleas, causing paralysis and death.
Safe vs Dangerous Tick Treatments
⚠️ Common Side Effects of Oral Tick Medicines
Most dogs tolerate these medications well, but some may experience mild side effects.
🟡 Mild Side Effects:
Vomiting
Diarrhea
Drooling
Sleepiness
Reduced appetite
Mild itching
🚨 Serious Side Effects (Rare but Important)
🔴 Watch for:
Tremors
Seizures
Muscle twitching
Wobbling
Collapse
Severe lethargy
Dogs at higher risk:
Dogs with seizure history
Sensitive breeds (Collies, Shelties, Australian Shepherds)
Dogs with liver disease
📉 INFOGRAPHIC: Warning Signs After Giving Oral Tick Medicine
☠️ Biggest Danger: Giving the Wrong Pesticide
Some owners accidentally use:
❌ Farm chemicals
❌ Livestock dewormers
❌ Concentrated insecticides
❌ Human medications
This can cause:
Poisoning
Organ failure
Neurological damage
Death
🧬 Special Warning: MDR1 Gene Sensitivity
Certain breeds can be highly sensitive to some antiparasitic drugs.
High-risk breeds:
Collie
Border Collie
Shetland Sheepdog
Australian Shepherd
Symptoms:
Blindness
Tremors
Coma
🛡️ Safety Checklist Before Giving Oral Tick Medicine
✅ Always:
✔ Use vet-approved dog medicines only
✔ Check exact body weight
✔ Follow dosage instructions
✔ Avoid mixing multiple parasite products
✔ Buy from trusted veterinary sources
❌ Never:
✘ Use cattle ivermectin without veterinary guidance
✘ Give cat products to dogs
✘ Repeat dose early
✘ Use homemade pesticide remedies
📦 Natural Doesn’t Always Mean Safe
Garlic, essential oils, or random “natural tick cures” may also be toxic.
Dr. Suranjan Sarkar is a veterinarian and also a writer and editor for both print and digital with a love for travel, animal, and architecture. Much of his writing has focused on human and animal health and welfare. A life-long pet owner, His two favorite canine quotes are, “Be the kind of person your dog thinks you are,” and “Dogs communicate their feelings honestly and directly. There’s no hidden agenda or manipulation.”
