SIMPARICA

If you mean Simparica 40 mg (sarolaner) for a dog weighing 10–20 kg, here are the key details:

• Active ingredient: Sarolaner 40 mg.
• For dogs: The 40 mg tablet is intended for dogs over 10 kg up to 20 kg. One tablet is the dose for this weight range. Zoetis+1
• What it treats: Fleas and ticks; depending on the country's approved label, it may also be indicated for certain mite infestations. Zoetis
• How often: 1 chewable tablet orally once every month. The recommended sarolaner dose is approximately 2–4 mg/kg. Drugs.com
• With food: It can generally be given with or without food. Zoetis
• Duration: The product information reports persistent flea/tick killing activity for at least 5 weeks. Zoetis
• Important: Simparica is not the same as Simparica Trio. Simparica contains sarolaner alone, whereas Trio also contains moxidectin and pyrantel and covers additional internal parasites. 1mg

Safety

Simparica belongs to the isoxazoline class. Neurologic adverse reactions such as tremors, ataxia, or seizures are possible, although uncommon. If your dog has a history of seizures or neurologic disease, discuss it with a veterinarian before giving it.