5 Unopened monthly doses. Protects against fleas, flea eggs and larvae, ticks, mosquitoes, biting flies, and lice. For dogs over 7 weeks old and 55+ pounds. only one of 6 doses was used. We lost our big guy 2 weeks ago. I don't want these to go to waste so we are letting it go at a serious discount. $106 at the vet were we bought it. I am selling them for $50. Only $10 per dose!