This is a great dewormer, I use the 1 gram packets, and it works well. The vet prescribed the 2 boxes of 2gram packets for my other peke for 6 days when he had giardia. It worked as well as the 1 gram. Package says if your dog’s weight is in-between the suggested dosing sizes, it is safe to use the next higher size. I give them in prevention for 3 days and also when they have worms.

Panacur C Canine Dewormer (1 Gram) $6.82