J’s 4fleas tablets are the first GSL licensed, oral, cat and dog flea treatment available over the counter. While being incredibly effective in killing fleas it has no contra-indications making it safe for children to play with pets after treatment. Clinical Trials have shown that 4fleas tablets killed 4 times as many fleas in the first 3 hours on cats, 3 times on dogs, as the leading veterinary flea treatment. For Cats & Kittens over 4 weeks of age.
