Generic tablets are NOT chewable Nuheart Heartworm tablets for Dogs (Ivermectin) is a monthly tablet used for the prevention of heartworm disease in dogs. It is a generic version of the Heartgard tablets. The active ingredient is exactly the same as in Heartgard and each tablet contains exactly the same amount of ingredient. The tablets are meat flavored and are readily accepted by dogs. For difficult dogs Nuheart tablets can be dissolved in a small amount of water and mixed in the pet's food. Fact Table Formula C48H74O14 License EU EMA, US FDA Bioavailability - Legal status RX Only Chemical Name Ivermectin Elimination half-life 18 hours Dosage (Strength) Heartgard blue for dogs up to 25 lbs (6 tablets), Heartgard green for dogs 26-50 lbs (6 tablets), Heartgard brown for dogs 51-100 lbs (6 tablets) Pregnancy Consult a vet Brands Nuheart Heartworm tablets Protein binding 93% PubChem CID 6321424 MedlinePlus a607069 ChEBI 6078 ATC code D11AX22, P02CF01, QP54AA01, QS02QA03 DrugBank DB00602 KEGG D00804 Routes of administration By mouth (tablets)