Can I Give My Dog Capstar?

Yes, with care
Nitenpyram (oral flea knock-down) is commonly referenced for dogs at published doses. Published guidance for dogs: one 11.4 mg tablet (2-25 lb) or 57 mg tablet (over 25 lb), once daily as needed. Kills adult fleas within hours, zero residual, pair with a monthly preventive. Safe from 4 weeks age / 2 lb.
Source: Merck Veterinary Manual
Get the exact range for your dog's weight

Skip it or ask a vet first if

under 2 lb / 4 weeks old

The safe habit

Confirm any medication decision with your veterinarian, who knows your dog's health history and other medications. VetDose shows published reference data, not prescriptions.