POM-V Prescription Required

Omepratex 370 mg/g Oral Paste for Horses

Active ingredient: Omeprazole

Form

Paste

Species

Horses

Manufacturer

Chanelle Pharmaceuticals Manufacturing Ltd

VMD MA No.

08749/3126

What it's used for

For treatment and prevention of gastric ulcers.

Full indications, dosage and side effects ↓

View official SPC (PDF)

The prescription itself has a price. See what practices near you charge for a consultation and the written prescription fee.

Paying less for Omeprazole

1

Ask your vet for a written prescription

They must provide one on request. Under the CMA Order the fee is capped at £21 from 2027.
2

Fill it at a registered online retailer

The CMA found online pharmacies 50–60% cheaper than practice dispensing on common medicines — typically £200–£300 a year.

Your prescription rights → VMD register of retailers →

Prescription required

Your vet must provide a written prescription on request. You can then purchase from any licensed online retailer.

Clinical information

Omepratex 370 mg/g Oral Paste for Horses — SPC Details

Source: VMD Summary of Product Characteristics (SPC). Last updated 26 Mar 2026.

For treatment and prevention of gastric ulcers.

Do not use in cases of hypersensitivity to the active substance or to any of the
excipient(s).

None known.
Do not use in cases of hypersensitivity to the active substance or to any of the
excipient(s).
Reporting adverse events is important. It allows continuous safety monitoring of
a veterinary medicinal product. Reports should be sent, preferably via a
veterinarian, to either the marketing authorisation holder or its local
representative or the national competent authority via the national reporting
system. See also the last section of the package leaflet for contact details.

None

Special precautions for use in animals
Stress (including high performance training and competition), feeding,
management and husbandry practices may be associated with the
development of gastric ulceration in horses. Individuals responsible for the well-
being of horses should consider reducing the ulcerogenic challenge by
modifying husbandry practices to achieve one or more of the following: reduced
stress, reduced fasting, increased intake of roughage and access to grazing.

Revised: November 2025
AN: 02292/2025
The product should not be used in animals under 4 weeks of age or weighing
less than 75 kg bodyweight.
Special precautions to be taken by the person administering the veterinary
medicinal product to animals
As this product may cause irritation and hypersensitivity reactions, avoid direct
contact with skin and eyes.
People with known hypersensitivity to omeprazole and/or sesame should avoid
contact with the veterinary medicinal product.
Personal protective equipment consisting of impervious gloves should be worn
when handling the veterinary medicinal product.
Do not eat or drink when handling and administering the product.
Wash hands or any exposed skin after use.
The dosing syringe should be returned to the original packaging and suitably
stored to prevent access by children.
In case of contact with eyes, wash immediately with clean running water and
seek medical advice, and show the package leaflet or the label to the physician
if symptoms persist.
Persons developing a reaction after contact with the product should avoid
handling the product in future.
Special precautions for the protection of the environment
Not applicable
Other precautions
Not applicable

Omeprazole may delay the elimination of warfarin. Omeprazole may potentially
alter benzodiazepine metabolism and prolong CNS effects. Clarithromycin may
increase levels of omeprazole. Omeprazole may reduce cyclosporine
metabolism. Omeprazole may decrease absorption of drugs requiring
decreased gastric pH for optimal absorption (ketoconazole, itraconazole, iron,
ampicillin esters).
No other interaction with medicines routinely used in the treatment of horses is
expected, although interaction with drugs metabolised by liver enzymes cannot
be excluded.

Do not store above 25ºC. Replace cap after use

Prevention of gastric ulcers: one administration per day at the dose rate of 1 mg
omeprazole per kg body weight.
To ensure a correct dosage, body weight should be determined as accurately
as possible.
To deliver the product at the dose of 4 mg omeprazole/kg, set the syringe
plunger to the appropriate dose division for the horse’s weight. Each 100 kg
dose division on the syringe plunger delivers sufficient omeprazole to treat 100
kg body weight. The contents of one syringe will treat a 700 kg horse at the rate
of 4 mg omeprazole per kg body weight.
To deliver the product at the dose of 1 mg omeprazole/kg, set the syringe
plunger to the dose division equivalent to one quarter of the horse’s body
weight. At this dose, each 100kg dose division on the syringe plunger will
deliver sufficient omeprazole to treat 400 kg body weight. For example, to treat
a horse weighing 400 kg, set the plunger to 100 kg.

Revised: November 2025
AN: 02292/2025
Replace cap after use.
4.10 Overdose (symptoms, emergency procedures, antidotes), if necessary
No undesirable effects related to treatment were observed following daily use
for 91 days at omeprazole dosages up to 20 mg/kg in adult horses and in foals
older than 2 months.
No undesirable effects related to treatment (in particular no adverse effect on
the semen quality or reproductive behaviour) were observed following daily use
for 71 days at an omeprazole dosage of 12 mg/kg in breeding stallions.
No undesirable effects related to treatment were observed following daily use
for 21 days at an omeprazole dosage of 40 mg/kg in adult horses.
4.11 Withdrawal period(s)
Meat and offal: 1 day
Not authorised for use in mares producing milk for human consumption.
5.

This information is sourced from the official Summary of Product Characteristics (SPC) published by the Veterinary Medicines Directorate (VMD). It is provided for informational purposes only and does not replace professional veterinary advice. Always consult your vet before administering any medication.