This oral treatment in the form of tablets is a preventive against common intestinal worms. It protects your pet from hookworm, roundworm, tapeworm, and whipworm. This tablet is also effective against heartworm when given on monthly basis. But it is fully effective against gastrointestinal worms when administrated every 3 months. A regular and proper treatment on Milbemax kills worms in the larvae stage also.