: Ensure you select the correct box color based on your dog's current weight (e.g., Yellow for 26–50 lbs, Blue/White for 51–100 lbs).
: Your vet must test your dog for existing heartworms before writing the prescription, as giving the preventative to an infected dog can be dangerous. where to buy sentinel for dogs online
: Sentinel must be administered with a full meal to ensure the medication is properly absorbed into the bloodstream. : Ensure you select the correct box color
Most reputable pet pharmacies will contact your vet directly to verify the prescription during checkout. Yellow for 26–50 lbs