Capstar for Dogs (nitenpyram)

When a flea infestation hits, waiting days for relief isn’t an option. This oral flea treatment is formulated with nitenpyram, a fast-acting ingredient that begins killing adult fleas within 30 minutes of administration. For pet owners dealing with sudden outbreaks, that speed matters.

Unlike topical treatments that require drying time or leave residue, this tablet works systemically. Once ingested, it enters the bloodstream and targets adult fleas quickly, often resulting in visible flea drop-off shortly after dosing. It’s especially useful in situations where immediate relief is needed — before grooming appointments, travel, boarding, or introducing pets into a clean environment.

Another practical advantage is flexibility. If reinfestation occurs, an additional dose can be given as often as once daily. That makes it a strong short-term intervention tool while you address the broader environment (bedding, carpets, yard).

This formula is:

• Safe for dogs and puppies 4 weeks and older

• Designed for dogs weighing 25.1–125 lbs

• Available over the counter — no prescription required

It’s important to note that this product kills adult fleas only. It does not provide long-term residual protection or target eggs and larvae. Many pet owners use it as an emergency flea treatment alongside a monthly preventative program.

For large-breed dogs experiencing an active flea problem, this is one of the fastest oral flea medications available for rapid knockdown relief.

Key Features

• Starts killing adult fleas within 30 minutes

• Contains nitenpyram (57 mg strength for dogs 25+ lbs)

• Fast relief during active flea infestations

• Can be given once daily if reinfested

• No prescription required

• Safe for puppies 4 weeks and older

• 6 oral tablet doses per package

If immediate flea control is the priority, this oral solution is built for speed and convenience.