FDA Authorizes Emergency Use of Nitenpyram to Combat Screwworm Infections in Pets

Friday, 12 June 2026, 14:42

FDA has authorized the emergency use of nitenpyram for treating screwworm infections in pets. This historic approval marks a significant step in combating this dangerous parasite. Nitenpyram is the first generic animal drug approved for this purpose.
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FDA Authorizes Emergency Use of Nitenpyram to Combat Screwworm Infections in Pets

FDA Clears Emergency Use of Nitenpyram

The U.S. Food and Drug Administration has granted emergency use authorization for nitenpyram, a medication aimed at treating New World screwworm infestations in dogs and cats. This authorization is particularly crucial as it is the first generic animal drug approved for combatting this flesh-eating parasite. Nitenpyram tablets can be administered to pets weighing at least two pounds and over four weeks old.

Insights into Screwworms and Treatment

Historically, the New World screwworm's larvae consume live flesh and fluids, posing a grave threat to both wildlife and domesticated animals. Studies conducted in Brazil show that treatment with nitenpyram effectively expelled most of the maggots in infested animals, while the remaining larvae succumb to the treatment. The FDA cautioned that after administering nitenpyram, animals may still need veterinary intervention to remove any remaining live or dead larvae.

Emergency Use Clarification

The FDA relies on emergency use authorizations to expedite patient access to essential treatments amid urgent situations. With recent incidents of screwworm infestations reported in Texas and New Mexico, this emergency approval is more critical than ever.

In Summary

The FDA's authorization of nitenpyram represents a milestone in the fight against screwworm infestations, ensuring pets receive the necessary treatment to combat this serious health issue.


This article was prepared using information from open sources in accordance with the principles of Ethical Policy. The editorial team is not responsible for absolute accuracy, as it relies on data from the sources referenced.

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