Capstar oral flea tablets for dogs 25–125 lb, 12 doses — fast-acting, starts killing fleas in 30 minutes

Capstar for Dogs is a fast-acting oral flea tablet (nitenpyram) that begins killing adult fleas within 30 minutes, providing rapid relief for dogs 25.1–125 lbs.

When fleas suddenly appear, many pet owners want a reliable way to remove adult fleas quickly while they address the home and yard. Capstar offers an over-the-counter oral solution formulated specifically for dogs and puppies 4 weeks and older weighing between 25.1 and 125 pounds. Each package here contains twelve doses (two boxes of six) so you can treat urgent infestations or retreat as needed.

How quickly will I notice results after giving Capstar?

Capstar begins acting very rapidly; pet owners often see dead fleas within the first hour. The active ingredient, nitenpyram, targets adult fleas and will eliminate a high percentage of them in a short time frame, helping reduce biting and visible flea activity.

• Starts killing adult fleas in about 30 minutes.
• Many dogs show major reduction in fleas within 4 hours.
• Visible flea fall-off helps confirm effectiveness.

How do I administer Capstar to my dog?

Capstar tablets are given orally and can be given directly or hidden in a small treat. The tablet is quick to offer and easy to give, and no prescription is required. Always confirm the tablet strength is appropriate for your dog’s weight range.

• Give whole tablet by mouth or in food/treat if needed.
• Suitable for dogs and puppies 25.1–125 lbs and ≥4 weeks old.
• Can be repeated as often as once daily when reinfestation occurs.

Is Capstar safe for puppies and large dogs?

Capstar’s 57 mg tablets are formulated for dogs and puppies weighing 25.1–125 pounds and for puppies at least 4 weeks old. As with any medication, follow dosing instructions and consult your veterinarian if your pet has health issues, is pregnant, or is on other medications.

• Text-labeled for 25.1–125 lb weight range.
• Approved for puppies from 4 weeks of age in this weight group.
• No prescription needed for over-the-counter use.

When should I use Capstar instead of longer-term flea control?

Capstar is ideal for rapid response to adult fleas—great when you need immediate relief or want to break an infestation quickly. For ongoing protection, combine Capstar with a vet-recommended monthly prevention product and environmental measures to control immature flea stages.

• Use for immediate adult-flea control and reinfestation events.
• Use daily if reinfestation continues until longer-term control begins.
• Pair with environmental cleaning and preventive treatments for lasting control.

Who this is for: Capstar for Dogs is best for pet owners who need fast, over-the-counter relief from adult flea bites for larger dogs and puppies (25.1–125 lbs). It suits households seeking a rapid, temporary solution—such as treating an unexpected infestation, giving immediate comfort to a flea-bitten pet, or bridging the gap until a longer-term flea control regimen takes effect. If you have concerns about safety, interactions, or chronic pest problems, consult your veterinarian to create a comprehensive flea-management plan tailored to your pet and home.

Ingredients

Active Ingredient: Nitenpyram