Date published: 2025-9-9

1-800-457-3801

SCAH Portrait Logo
Seach Input

Marquis®

by Boehringer Ingelheim
5.0(2)
Write a reviewAsk a question
EPM antiprotozoal treatment for horses to help prevent additional nervous system damage
    • FDA approved treatment for equine protozoal myeloencephalitis (EPM)
    • Kills Sarcocystis neurona to prevent further damage to central nervous system
    • Contains the active ingredient ponazuril
    • Requires a veterinarian's prescription
    • Provided as an oral paste
Catalog #DescriptionPriceQtyAutoshipCARTFAVORITES
sc-362888Rx
4 x 127 g tubes
$1289.09
Autoship Logo

Click product's Autoship icon - choose frequency at Checkout.

* Autoship only available in the US

Why Autoship?

Never forget a shipment so you're always stocked.

Saves you 5% on UltraCruz® products.

You manage the frequency or cancellation to fit your needs.

Free shipping within the contiguous US on orders over $75

Marquis® is the first FDA approved treatment for equine protozoal myeloencephalitis (EPM).

Equine protozoal myeloencephalitis (EPM) is a common neurologic disease of horses living in the Americas. EPM is caused by the protozoa Sarcocystis neurona and leads to inflammation of the brain and spinal cord, resulting in various neurological deficits in horses such as abnormal gait, stumbling, falling and an inability to rise. The definitive host of EPM is the opossum, which sheds infective sporocysts of S. neurona that infect horses.

Marquis® is an antiprotozoal oral paste approved by the FDA for the treatment of horses with EPM. It contains the active ingredient ponazuril which crosses the blood/brain barrier to reach the central nervous system. Once it has reached the central nervous system, ponazuril works to kill S. neurona to prevent the parasite from causing further damage.

Each package of Marquis® contains sufficient paste to treat one 1200 lb horse for 28 days. The safe use of Marquis® in horses used for breeding purposes, during pregnancy, or in lactating mares has not been evaluated.

Supplied as a package of four 127 g tubes. Please note that this product requires a veterinarian's prescription for purchase.

loader

dosage for a 1600 lb horse? Can't figure out how to use syringe?

Asked by: Big Girl
This is a prescription item and we would suggest reaching out to your veterinarian for dosage that best suits your horse. Thank you, SCAH Team
Answered by: Mandy
Date published: 2024-04-15
  • y_2025, m_8, d_27, h_5CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.42
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_1
  • loc_en_US, sid_bay-mar, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_scahealth
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getContent, 137ms
  • QUESTIONS, PRODUCT
Rated 5 out of 5 by from Very expensive productVery expensive product, but it does a great job of treating EPM. There are many compounded products on the market, but I would rather spend the money on the brand name and know Im getting what I paid for!
Date published: 2014-01-16
Rated 5 out of 5 by from Have used a lot of this product.Have used a lot of this product. Good price
Date published: 2014-01-20
  • y_2025, m_8, d_27, h_5
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.42
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_2
  • loc_en_US, sid_bay-mar, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_scahealth
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getReviews, 13ms
  • REVIEWS, PRODUCT
Marquis is rated 5.0 out of 5 by 2.
  • y_2025, m_8, d_27, h_5
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.42
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_2
  • loc_en_US, sid_bay-mar, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_scahealth
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getAggregateRating, 151ms
  • REVIEWS, PRODUCT