Frontline DFRMDPLUS6 6-Pack 23 to 44-Pound Plus dogs Flea and Tick Treatment, Medium, Blue Frontline Plus provides a convenient spot treatment for fast acting long lasting control of fleas, ticks and chewing lice Kills all stages of 4 major ticks, including those that may carry Lyme disease Each packet has 6 applications providing 6 months of protection Remains waterproof for 30 days even if dog or cat swims or is bathed EPA Approved - EPA Reg. No. 65331-5 EPA Est. 65331-FR-2