How Do Flea and Tick Medications Work?
Topical treatments tend to be the most popular form of flea and tick prevention and are used by applying the medication between your pet’s shoulder blades or at the base of their neck. They are absorbed by the animal’s oil and sweat glands in the skin and help your pet repel fleas and ticks within 24 hours. These medications are waterproof but need a full day to dry after being applied.
Pets treated with these medications can still pick up fleas and ticks. The flea or tick must bite your pet to ingest the chemical that has spread throughout your pet’s skin glands.