Metaxol 20/100 mg/ml Solution for Use in Drinking Water for Pigs and Chickens
Active ingredients: Sulfamethoxazole, Trimethoprim
Form
Liquid
Species
Manufacturer
Eurovet Animal Health B.V.
VMD MA No.
16849/3008
What it's used for
trimethoprim-sulfamethoxazole. Broilers: Treatment and metaphylaxis of: - Colibacillosis caused by Escherichia coli susceptible to trimethoprim- sulfametho...
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Metaxol 20/100 mg/ml Solution for Use in Drinking Water for Pigs and Chickens — SPC Details
Source: VMD Summary of Product Characteristics (SPC). Last updated 27 Mar 2026.
Broilers:
Treatment and metaphylaxis of:
- Colibacillosis caused by Escherichia coli susceptible to trimethoprim-
sulfamethoxazole.
- Coryza caused by susceptible to trimethoprim-
sulfamethoxazole.
AN: 00299/2023 & 02135/2023
The presence of the disease in the group/flock must be established before the
veterinary medicinal product is used.
The veterinary medicinal product can be added directly to the drinking water to
prepare a therapeutic solution at the calculated concentration, but can also be used
in a concentrated stock solution by adding 200 ml of the veterinary medicinal product
per litre of water and diluting this further.
Fattening pigs:
5 mg trimethoprim and 25 mg sulfamethoxazole per kg body weight a day, for 4-7
days. This corresponds to 1 ml of the veterinary medicinal product per 4.0 kg body
weight per day. Based on the recommended dose, daily water consumption, and the
number and weight of the pigs to be treated, the exact daily concentration of the
veterinary medicinal product should be calculated according to the following formula:
Mean body weight (kg) of pigs to be
treated
Mean daily water consumption (litre) per
pig x 4.0
= xx ml veterinary medicinal
product per litre drinking water
Broilers:
7.5 mg trimethoprim and 37.5 mg sulfamethoxazole per kg body weight a day, for 3
days. This corresponds to 1 ml of the veterinary medicinal product per 2.67 kg body
weight per day. Based on the recommended dose, daily water consumption, and the
number and weight of the birds to be treated, the exact daily concentration of the
veterinary medicinal product should be calculated according to the following formula:
Mean body weight (kg) of birds to be
treated
Mean daily water consumption (litre) per
bird x 2.67
= xx ml veterinary medicinal
product per litre drinking water
To ensure a correct dosage, the body weight and water consumption should be
determined as accurately as possible.
The daily amount is to be added to the drinking water such that all medication will be
consumed in 24 hours. Medicated drinking water and stock solutions should be
freshly prepared every 24 hours. During the treatment period animals should not
have access to water sources other than the medicated water. However, it should be
ensured that animals always have sufficient water available. After the end of the
medication period, the water supply system should be cleaned appropriately to avoid
intake of sub-therapeutic amounts of active substance. The intake of medicated
water depends on the clinical condition of the animals. In order to obtain the correct
dosage the concentration of the veterinary medicinal product may need to be
adjusted accordingly.
Do not use in animals with impaired haematopoietic systems.
Do not use in cases of hypersensitivity to sulphonamides or trimethoprim or any of
the excipients.
Rare
(1 to 10 animals / 10,000
animals treated):
Hypersensitivity reaction.
Chickens:
Rare
(1 to 10 animals / 10,000
animals treated):
Hypersensitivity reaction.
Decreased drinking.
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 the package leaflet for
respective contact details.
necessary the concentration of the veterinary medicinal in the drinking water should
be adjusted to make sure that the recommended dosage is being consumed.
However if the concentration of the veterinary medicinal product is increased too
much, the intake of the medicated drinking water decreases for palatability reasons.
Therefore water intake should be monitored regularly, especially in broilers.
In case of insufficient intake of water, pigs should be treated parenterally.
Special precautions for safe use in the target species:
Due to the likely variability (time, geographical) in susceptibility of bacteria for
potentiated sulphonamides, occurrence of resistance of bacteria may differ from
country to country and even from farm to farm, and therefore bacteriological sampling
and susceptibility testing are recommended. Use of the veterinary medicinal product
should be based on culture and sensitivity of micro-organisms from diseased cases
on farm or from recent previous experience on the farm. Use of the veterinary
medicinal product deviating from the instructions given in the SPC may increase the
prevalence of bacteria resistant to sulfamethoxazole and trimethoprim and may also
decrease the effectiveness of combinations of trimethoprim with other sulphonamides
due to the potential for cross resistance. Official and local antimicrobial policies
should be taken into account when the veterinary medicinal product is used.
Special precautions to be taken by the person administering the veterinary medicinal
product to animals:
Sulphonamides may cause hypersensitivity (allergy) following injection, inhalation,
ingestion or skin contact. Hypersensitivity to sulphonamides may lead to cross
reactions with other antibiotics. Allergic reactions to these substances may
occasionally be serious.
Do not handle this veterinary medicinal product if you know you are sensitive to
sulphonamides.
If you develop symptoms following exposure, such as a skin rash, you should seek
medical advice and show the physician this warning.
.
This veterinary medicinal product may cause skin- and respiratory irritation as well as
eye damage.
Personal protective equipment consisting of impermeable gloves, e.g. rubber or latex
and protective glasses, should be worn when handling the veterinary medicinal
AN: 00299/2023 & 02135/2023
product including when mixing the veterinary medicinal product with drinking water.
Avoid inhalation. In the event of eye contact, rinse the eye with large amounts of
clean water and, if irritation occurs, seek medical attention. In the event of accidental
ingestion, seek medical advice and show the package leaflet or the label to the
physician. Wash hands and contaminated skin immediately after handling the
veterinary medicinal product. Laboratory studies in rabbits and rats with the excipient
N-methyl pyrrolidone have shown evidence of foetotoxic effects. The veterinary
medicinal product should not be administered by pregnant women and women
suspected of being pregnant. Personal protective equipment consisting of gloves
should be worn when handling the veterinary medicinal product by women of
childbearing age.
Special precautions for the protection of the environment:
Not applicable.
Chickens: Meat and offal: 5 days.
Not for use in birds producing or intended to produce eggs for human consumption.
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.
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Other Products Containing Sulfamethoxazole
These products share the same active ingredient and may be suitable alternatives. Always consult your vet.
Metaxol 20/100 mg/ml Solution for Use in Drinking Water for Pigs and Chickens
POM-VEurovet Animal Health B.V.
Methoxasol 20/100 mg/ml Solution for Use in Drinking Water for Pigs and Chickens
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Methoxasol 20/100 mg/ml Solution for Use in Drinking Water for Pigs and Chickens
POM-VEurovet Animal Health B.V.
Sulfatrim (16 mg/ml + 80 mg/ml) Oral Drops
POM-VAlfasan Nederland B.V.
Trimsulfasol 20/100 mg/ml Solution for Use in Drinking Water for Pigs and Chickens
POM-VDopharma Research B.V.
Trimsulfasol 20/100 mg/ml Solution for Use in Drinking Water for Pigs and Chickens
POM-VDopharma Research B.V.
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