Purchasing your pet's medications and parasite preventatives directly through your veterinarian ensures you get the highest quality and safest products out there. Additionally, purchasing from your veterinarian means you get the manufacturer's warranty and rebate (if one applies). Purchasing medications from other online sources does not guarantee the medication's safety or efficacy. In fact, some online pet stores where you do not need a prescription may sell you counterfeit, expired, or otherwise damaged medication. To ensure the safety and health of your pet, it's best to buy medications from a trusted source!