Bob Martin Flea Tablets is an easy to use & highly effective method of killing fleas. Can be used instead of a flea spray or shampoo, & the effects are almost immediate! These tablets provide welcome relief from fleas within 15 minutes & lasts for up to a whole 24 hours. After which another tablet should be administered or a spot on treatment such as Bob Martin Double Action Spot On. Kills fleas fast Effective within 15 minutes Kills 100% of fleas in 24 hours