Praziquantel and Pyrantel
Quest Plus is a brand-name veterinary anthelmintic medication used to treat and control internal parasites in horses. It combines multiple active ingredients to target a broad spectrum of common equine parasites including tapeworms, roundworms, hookworms, and pinworms.
Quest Plus is a broad-spectrum dewormer for horses that treats and controls various internal parasites.
Key facts at a glance
- RxNorm
- 1488308
- Generic
- Quest Plus
- Class
- brand-name
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Quest Plus is indicated for the treatment and control of internal parasites in horses, including tapeworms (Anoplocephala perfoliata), large strongyles (Strongylus vulgaris), small strongyles, pinworms (Oxyuris equi), and roundworms (Parascaris spp.).
Quest Plus contains anthelmintic agents that work by disrupting the parasites' metabolic processes and neuromuscular function, causing paralysis and death of the parasites which are then eliminated from the horse's gastrointestinal tract.
Quest Plus is for veterinary use only in horses. Administer according to weight-based dosing instructions. Consult a veterinarian for proper diagnosis and deworming schedule, as overuse of anthelmintics can contribute to parasite resistance. Safety in breeding or pregnant horses should be confirmed with a veterinarian.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 9, 2026. · Read our editorial policy