POM-V Prescription Required

Rhemox Forte, 1000 mg/g Powder for Use in Drinking Water for Chickens, Ducks, Turkeys

Active ingredient: Amoxicillin Trihydrate

Form

Powder

Species

Chickens Duck Turkeys

Manufacturer

Industrial Veterinaria SA

VMD MA No.

36547/5002

What it's used for

Treatment of infections in chickens, ducks and turkeys caused by bacteria susceptible to amoxicillin.

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 Amoxicillin Trihydrate

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

Rhemox Forte, 1000 mg/g Powder for Use in Drinking Water for Chickens, Ducks, Turkeys — SPC Details

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

Treatment of infections in chickens, ducks and turkeys caused by bacteria
susceptible to amoxicillin.

In drinking water use.
Dosage:
Use the following formula in order to calculate the quantity of the product (mg) that
should be incorporated in the drinking water tank:
To ensure a correct dosage, bodyweight should be determined as accurately as
possible to avoid underdosing. The uptake of medicated water depends on the
clinical condition of the birds. In order to obtain the correct dosage the concentration
of amoxicillin has to be adjusted taking into account water intake.
Suitably calibrated weighing equipment should be used for dispensing the calculated
amount of the product.
Solubility in water varies depending on temperature and water quality as well as on
time and intensity of stirring. Under worst case conditions (4 °C and soft water)
maximum solubility is approximately 1.0 g/l but increases by raising temperature. At
20 °C and in hard water maximum solubility is increased to at least 2.1 g/l. Complete
dissolution of the powder should be ensured.
For stock solutions and for use of a proportioner: Take care not to exceed maximum
solubility which can be achieved under the given conditions. Adjust flow rate settings
of the dosing pump according to concentration of the stock solution and water intake
of the animals treated. Moderate increase of temperature and constant stirring can
help to raise solubility.
Chickens
Recommended dosage is 15 mg amoxicillin trihydrate/kg bodyweight.
The total period of treatment should be for 3 consecutive days or in severe cases for
5 consecutive days.
Ducks
Recommended dosage is 20 mg amoxicillin trihydrate/kg bodyweight for 3
consecutive days.
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Revised: November 2025
AN: 02317/2025
Turkeys
Recommended dosage is 15-20 mg amoxicillin trihydrate/kg bodyweight for 3
consecutive days or in severe cases for 5 consecutive days.
Administration route:
The product is administered in the drinking water. Prepare the solution with fresh tap
water immediately before use. Any unused medicated water should be discarded
after 24 hours.
In order to ensure consumption of the medicated water, animals should not have
access to other water supplies whilst being treated.
After the end of the medication period the water supply system should be cleaned
appropriately to avoid intake of sub-therapeutic amounts of the active substance.

Do not use in animals with hypersensitivity to penicillins and other ß-lactam
antibiotics.
Do not use in ruminants and horses and lagomorphs and rodents such as rabbits,
hamsters, gerbils and guinea pigs.
Do not administer to animals with renal disease including anuria or oliguria.

Penicillins and cephalosporins may cause hypersensitivity reactions following
administration in very rare occasions. Allergic reactions to these substances may
occasionally be serious. If suspected adverse reactions do occur, treatment should
be discontinued immediately.
The frequency of adverse reactions is defined using the following convention:
- very common (more than 1 in 10 animals treated displaying adverse reaction(s))
- common (more than 1 but less than 10 animals in 100 animals treated)
- uncommon (more than 1 but less than 10 animals in 1,000 animals treated)
- rare (more than 1 but less than 10 animals in 10,000 animals treated)
- very rare (less than 1 animal in 10,000 animals treated, including isolated reports).

None.

Special precautions for use in animals
Official, national and regional antimicrobial policies should be taken into account
when the product is used.

Revised: November 2025
AN: 02317/2025
Use of the product should be based on susceptibility testing of the bacteria isolated
from the animal. If this is not possible, therapy should be based on local (regional,
farm level) epidemiological information about susceptibility of the target bacteria.
Use of the product deviating from the instructions given in the SPC may increase the
prevalence of bacteria resistant to the amoxicillin and may decrease the
effectiveness of the treatment.
Special precautions to be taken by the person administering the veterinary medicinal
product to animals
Penicillins and cephalosporins may cause hypersensitivity (allergy) following
injection, inhalation, ingestion or skin contact. Hypersensitivity to penicillins may lead
to cross reactions to cephalosporins and vice versa. Allergic reactions to these
substances may occasionally be serious.
People with known hypersensitivity to beta-lactam antibiotics should avoid handling
the product. Handle this product with great care to avoid exposure, taking all
recommended precautions:
• Avoid inhalation of dust. Wear either a disposable half-mask respirator
conforming to European Standard EN149 or a non disposable respirator
to European Standard EN140 with a filter to EN143.
• Wear impervious gloves during preparation and administration of
medicated water.
• Wash any exposed skin after handling the product or medicated water.
• Wash hands after use.
If you develop symptoms following exposure such as a skin rash, you should seek
medical advice and show the doctor this warning. Swelling of the face, lips or eyes
or difficulty with breathing are more serious symptoms and require urgent medical
attention.

The product should not be administered with antibiotics that have a bacteriostatic
mode of action, such as tetracyclines, macrolides, sulphonamides.Not to be used
simultaneously with neomycin since it blocks the absorption of oral penicillins.

Store in a dry place.
Keep the bag tightly closed after first opening in order to protect from moisture and
light.
This veterinary medicinal product does not require any special temperature storage
conditions.
Any medicated water which is not consumed within 24 hours should be discarded.

Revised: November 2025
AN: 02317/2025

Meat and offal:
Chickens 1 day
Ducks 9 days
Turkeys 5 days
Not for use in birds producing or intended to produce eggs for human consumption.
Do not use within 3 weeks of the start of laying period.
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.