THIS IS FROM SCRUFFY'S ESTATE, SHE PASSED AWAY WITH CANCER AND THIS IS HER HEARTWORM FLEA MEDS, ONE TABLET A MONTH CAN TREAT ALL- HEARTWORM, FLEAS AND INTESTINAL WORMS. YOU MUST BE ALREAY ON SIMILAR MEDS OR TAKEN THIS TO CONTINUE WITH YOUR DOG. THIS IS FOR DOGS AND PUPPIES 8 WEEKS OF AGE AND OLDER, AND 5 LBS OR GREATER IN WEIGHT. THIS IS A PACKAGE OF 6 BUT ONLY 5 REMAIN. THIS IS ALSO FOR A DOG OF 40.1 - 60 LBS. EXPIRATION IS 8/2018, APPROVED BY THE FDA, TYPICALLY GOES OVER $110 A BOX