Vomiting after Nitenpyram (Capstar) in cats

The FDA has received 630 reports of vomiting in cats after Nitenpyram. That is 7.2% of all reports for this medicine, compared with 18% across reports for all cat medicines, so it is reported less often than average with this medicine.

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How soon it started

How the animals did

Problems reported at the same time

Age of the animals

About this medicine

Nitenpyram kills adult fleas quickly; a single-dose tablet.

Products with this ingredient include Capstar. The FDA hides brand names in its public data, so these reports cover every product with the same active ingredients.

Questions owners ask

Can Nitenpyram cause vomiting in cats?

630 reports link the two, but a report alone does not prove the medicine was the cause: other illnesses, other medicines or coincidence can be involved. Your vet can judge it for your animal.

How soon after a dose was it reported?

In half of the reports with dates, it started within the same day of the first dose.

What should I do?

Don't give another dose until you've spoken to your vet, and keep the packaging so you can tell them the product and dose. Your vet can also report it to the FDA (or you can, through the manufacturer or FDA form 1932a).

Vomiting with similar medicines

• Vomiting after Spinosad (Comfortis) 8,410 reports · 73% of its reports
• Vomiting after Imidacloprid + Moxidectin (Advantage Multi) 861 reports · 11% of its reports
• Vomiting after Lufenuron 222 reports · 20% of its reports
• Vomiting after Flumethrin + Imidacloprid (Seresto) 59 reports · 8.8% of its reports
• Vomiting after Imidacloprid + Pyriproxyfen 68 reports · 10% of its reports
• Vomiting after Fipronil 82 reports · 16% of its reports
• Vomiting after Fipronil + S-methoprene (Frontline Plus) 54 reports · 15% of its reports
• Vomiting after Imidacloprid 37 reports · 15% of its reports

All reported side effects of Nitenpyram in cats · Medicines most reported with vomiting