NextStar is the fastest-acting 30-day topical protection available* to help your pet fight off fleas and ticks. Our formula provides a monthly fast-acting, long-lasting solution to continue to protect your pet from fleas and ticks. Protect your pet from fleas & ticks with our veterinarian recommended** topical formula. With no prescription needed, NextStar helps protect against fleas & ticks without having to schedule a visit with the vet.