Capstar for Small Dogs 11MG [2-25LBS] Blue is safe to be used with other flea and tick treatments. It terminates fleas and prevents heavy flea infestations. This is an oral treatment that lasts for 24 hours. It is suitable for pregnant and lactating dogs and for puppies and dogs at least 4 weeks of age. Shop Flea Treatment at the lowest price with free shipping and earn rewards. Get 10% off with auto-order and 20% off on your next order. Apply Coupon Code: SUMR10