When I realized my dog had tapeworm I did not know what to do. I got on the net looked up what I needed without a prescription (because I just could not afford a trip to the vet) and found this product. I then called the pet stores but they charged way too much for it. I finally found the best price on Amazon and was able to get the meds to make my pup all well. It is a great product. It worked quickly and my pup felt better in a couple of days! Yea!