Nexgard is an oral medication used in the United States to protect dogs from fleas and ticks. Available in chewable form, it is typically administered once a month. The active ingredient in Nexgard works by killing fleas and ticks after they bite, preventing infestations and reducing the risk of tick-borne diseases. It is effective against multiple types of ticks and fleas, offering broad-spectrum protection for dogs. Nexgard is often prescribed by veterinarians and is considered a convenient solution for pet owners seeking a monthly, oral treatment for parasite control. Proper dosing is essential for optimal protection and safety.