Nexgard spectra is a tast, chewable tablet that prevents tick, flea and worms. Including adult roundworms, hookworm, whipworm and lungworm infestations and helps prevent heartworm disease. It also helps prevents the establishment of adult spirocerca lupi in the oesophagus. Achieves 100% efficacy in 6-8 hours and continues to protect dogs against fleas up to 30 days. Can be used on puppies from 8 weeks or older and in healthy dogs provided they have a minimum weight of 2kg. Unaffected by swimming or bathing of pet.