Our two black labs tested positive for lyme disease and we really didn't know what we were going to do as the antibiotics for the two were over $80.00 and the vet wanted them on NexGard for next 6 months which was priced at $15.00 a dose for a total of $180.00. We ordered them from here for $76.65 total and didn't need a prescription. If you know you are going to need something, give at least 2-3 weeks ahead, so you don't run out. Other than the long shipping time we are more than pleased!! And no more ticks and fleas!!!