Most deworming treatments work in two to six hours after administration. Some medications will dissolve the worms while some will paralyze them. Paralyzed worms pass through the intestinal tract and are passed out in your puppy's poop. This is why you will notice that your puppy poops worms after deworming.

How long does it take for dog wormer to work?

How long do dog worming tablets take to work? Most treatments get to work rapidly, killing intestinal worms starting from around 2 to 6 hours after administering the de-wormer.

How long does it take for worming tablets to work?

It can take up to 3 days for the dead worms to pass through the system. If reinfestation occurs after this time, take 1 tablet (100 mg) or 1 measuring spoon (5 mL) of the oral suspension again after 2 to 4 weeks.