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Huvamox 800 mg/g Powder for Use in Drinking Water for Chickens, Turkeys, Ducks and Pigs
Active ingredient: Amoxicillin Trihydrate
Form
Powder
Species
Chickens
Duck
Pigs
Turkeys
Manufacturer
Huvepharma N.V.
VMD MA No.
30282/3007
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Clinical information
Huvamox 800 mg/g Powder for Use in Drinking Water for Chickens, Turkeys, Ducks and Pigs — SPC Details
Source: VMD Summary of Product Characteristics (SPC). Last updated 27 Mar 2026.
In pigs:
susceptible to amoxicillin.
susceptible to amoxicillin.
Chickens:
The recommended dosage is 15 mg amoxicillin trihydrate per kg bodyweight per day,
equivalent to 13.1 mg of amoxicillin/kg of bodyweight/day (corresponding to 18.8 mg
veterinary medicinal product/kg bodyweight/day).
The total period of treatment should be for 3 days or in severe cases for 5 days.
AN: 03033/2022Page 4 of 8
Ducks:
Recommended dosage is 20 mg amoxicillin trihydrate/kg bodyweight per day,
equivalent to 17.4 mg of amoxicillin/kg of bodyweight/day (corresponding to 25 mg
veterinary medicinal product/kg bodyweight/day) for 3 consecutive days.
Turkeys:
Recommended dosage is 15-20 mg amoxicillin trihydrate/kg bodyweight per day,
equivalent to 13.1-17.4- mg of amoxicillin/kg of bodyweight/day (corresponding to
18.8-25 mg veterinary medicinal product/kg bodyweight/day) for 3 days or in severe
cases for 5 days.
Pigs:
Recommended dosage is 20 mg amoxicillin trihydrate/kg bodyweight per day,
equivalent to 17.4 mg of amoxicillin/kg of bodyweight/day (corresponding to 25 mg
veterinary medicinal product/kg bodyweight/day), for up to 5 days.
Use in drinking water:
For the preparation of medicated water, the body weight of the animals to be treated
and their actual daily water consumption should be taken into account. Consumption
may vary depending on factors like species, age, state of health, breed and husbandry
system (e.g. different temperature, different light regimes). In order to obtain the correct
dosage, the concentration of amoxicillin has to be adjusted accordingly.
Based on the recommended dose and the number and weight of animals to be treated,
the exact daily concentration of the veterinary medicinal product should be calculated
according to the following formula:
mg veterinary medicinal
product / kg bodyweight
dayX
average body weight
(kg) of animals to be
treated
average daily water intake (L/animal)
= mg of veterinary
medicinal product per
litre of drinking water
To ensure a correct dosage, bodyweight should be determined as accurately as
possible.
All animals to be treated should have sufficient access to the water supply system to
ensure adequate consumption of the medicated drinking water.
In order to ensure consumption of the medicated water, animals should not have
access to other water supplies whilst being treated.
Prepare the solution with fresh potable water.
Complete dissolution of the veterinary medicinal product should be ensured by gently
mixing the veterinary medicinal product until fully dissolved. The homogeneity of the
medicated drinking water should be kept during the administration to animals.
The maximum solubility of the veterinary medicinal product in water is 8 g/L at 20°C
and 3 g/L at 5°C. For stock solutions and when using a proportioner, take care not to
exceed the 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 to be treated.
Any medicated water which is not consumed within 24 hours should be discarded and
the medicated drinking water replenished.
AN: 03033/2022Page 5 of 8
Use in liquid feed (for pigs):
Administer in the liquid feed, to give 20 mg amoxicillin trihydrate/kg bodyweight per
day, equivalent to 17.4 mg of amoxicillin/kg of bodyweight/day (corresponding to 25
mg veterinary medicinal product/kg bodyweight/day) for up to 5 days. Medicated feed
should be freshly prepared on at least 2 occasions per day over the treatment period.
The daily dose should be calculated based on the number of animals and average
weight and then divided by the number of feeds lots prepared in the day.
Medicated liquid feed should be prepared with fresh potable water. Dissolve the
required amount of veterinary medicinal product to some or all of the water needed to
make the liquid feed. Maximum solubility of the veterinary medicinal product in water
is approximately 8 g/L at 20°C and 3 g/L at 5°C. The complete dissolution of the powder
should be ensured.
This medicated water can then be mixed with the dry complete meal and if
appropriate, the remaining water. The system used should ensure that the medicated
water is evenly distributed into the feed. Once prepared the final medicated liquid
feed should be fed to the pigs within 2 hours. Stability of amoxicillin in all commercial
feeds has not been established. In order to ensure that any loss of amoxicillin activity
is minimised, the quantity of medicated liquid feed prepared should not exceed the
amount of feed which will be consumed within 2 hours. The medicated liquid feed
should not be fermented. Any medicated liquid feed which is not consumed within 2
hours should be discarded.
Although restricted access to other water supplies would help ensure medicated liquid
feed is consumed, separate clean potable water should remain available at all times
for welfare reasons.
After the end of the medication period, the water and liquid feed supply systems should
be cleaned appropriately to avoid intake of sub-therapeutic amounts of the active
substance.
The recommended dosage is 15 mg amoxicillin trihydrate per kg bodyweight per day,
equivalent to 13.1 mg of amoxicillin/kg of bodyweight/day (corresponding to 18.8 mg
veterinary medicinal product/kg bodyweight/day).
The total period of treatment should be for 3 days or in severe cases for 5 days.
AN: 03033/2022Page 4 of 8
Ducks:
Recommended dosage is 20 mg amoxicillin trihydrate/kg bodyweight per day,
equivalent to 17.4 mg of amoxicillin/kg of bodyweight/day (corresponding to 25 mg
veterinary medicinal product/kg bodyweight/day) for 3 consecutive days.
Turkeys:
Recommended dosage is 15-20 mg amoxicillin trihydrate/kg bodyweight per day,
equivalent to 13.1-17.4- mg of amoxicillin/kg of bodyweight/day (corresponding to
18.8-25 mg veterinary medicinal product/kg bodyweight/day) for 3 days or in severe
cases for 5 days.
Pigs:
Recommended dosage is 20 mg amoxicillin trihydrate/kg bodyweight per day,
equivalent to 17.4 mg of amoxicillin/kg of bodyweight/day (corresponding to 25 mg
veterinary medicinal product/kg bodyweight/day), for up to 5 days.
Use in drinking water:
For the preparation of medicated water, the body weight of the animals to be treated
and their actual daily water consumption should be taken into account. Consumption
may vary depending on factors like species, age, state of health, breed and husbandry
system (e.g. different temperature, different light regimes). In order to obtain the correct
dosage, the concentration of amoxicillin has to be adjusted accordingly.
Based on the recommended dose and the number and weight of animals to be treated,
the exact daily concentration of the veterinary medicinal product should be calculated
according to the following formula:
mg veterinary medicinal
product / kg bodyweight
dayX
average body weight
(kg) of animals to be
treated
average daily water intake (L/animal)
= mg of veterinary
medicinal product per
litre of drinking water
To ensure a correct dosage, bodyweight should be determined as accurately as
possible.
All animals to be treated should have sufficient access to the water supply system to
ensure adequate consumption of the medicated drinking water.
In order to ensure consumption of the medicated water, animals should not have
access to other water supplies whilst being treated.
Prepare the solution with fresh potable water.
Complete dissolution of the veterinary medicinal product should be ensured by gently
mixing the veterinary medicinal product until fully dissolved. The homogeneity of the
medicated drinking water should be kept during the administration to animals.
The maximum solubility of the veterinary medicinal product in water is 8 g/L at 20°C
and 3 g/L at 5°C. For stock solutions and when using a proportioner, take care not to
exceed the 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 to be treated.
Any medicated water which is not consumed within 24 hours should be discarded and
the medicated drinking water replenished.
AN: 03033/2022Page 5 of 8
Use in liquid feed (for pigs):
Administer in the liquid feed, to give 20 mg amoxicillin trihydrate/kg bodyweight per
day, equivalent to 17.4 mg of amoxicillin/kg of bodyweight/day (corresponding to 25
mg veterinary medicinal product/kg bodyweight/day) for up to 5 days. Medicated feed
should be freshly prepared on at least 2 occasions per day over the treatment period.
The daily dose should be calculated based on the number of animals and average
weight and then divided by the number of feeds lots prepared in the day.
Medicated liquid feed should be prepared with fresh potable water. Dissolve the
required amount of veterinary medicinal product to some or all of the water needed to
make the liquid feed. Maximum solubility of the veterinary medicinal product in water
is approximately 8 g/L at 20°C and 3 g/L at 5°C. The complete dissolution of the powder
should be ensured.
This medicated water can then be mixed with the dry complete meal and if
appropriate, the remaining water. The system used should ensure that the medicated
water is evenly distributed into the feed. Once prepared the final medicated liquid
feed should be fed to the pigs within 2 hours. Stability of amoxicillin in all commercial
feeds has not been established. In order to ensure that any loss of amoxicillin activity
is minimised, the quantity of medicated liquid feed prepared should not exceed the
amount of feed which will be consumed within 2 hours. The medicated liquid feed
should not be fermented. Any medicated liquid feed which is not consumed within 2
hours should be discarded.
Although restricted access to other water supplies would help ensure medicated liquid
feed is consumed, separate clean potable water should remain available at all times
for welfare reasons.
After the end of the medication period, the water and liquid feed supply systems should
be cleaned appropriately to avoid intake of sub-therapeutic amounts of the active
substance.
Do not use in horses, rabbits, guinea pigs, hamsters, gerbils or any other small
herbivore given that amoxicillin, as for all aminopenicillins, has a deleterious effect on
caecal bacteria.
Do not use in ruminants.
Do not use in animals with hypersensitivity to penicillins or other ß-lactam antibiotics
or to any of the excipients.
AN: 03033/2022Page 2 of 8
Do not use in animals with renal disease including anuria or oliguria.
Do not use in the presence of ß-lactamase-producing bacteria.
herbivore given that amoxicillin, as for all aminopenicillins, has a deleterious effect on
caecal bacteria.
Do not use in ruminants.
Do not use in animals with hypersensitivity to penicillins or other ß-lactam antibiotics
or to any of the excipients.
AN: 03033/2022Page 2 of 8
Do not use in animals with renal disease including anuria or oliguria.
Do not use in the presence of ß-lactamase-producing bacteria.
Chickens, ducks, turkeys and pigs:
Undetermined frequency
(cannot be estimated from the
available data)’
Hypersensitivity reaction (varying from allergic
skin reaction to anaphylactic shock)
Digestive tract disorders (vomiting, diarrhoea)
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.
Undetermined frequency
(cannot be estimated from the
available data)’
Hypersensitivity reaction (varying from allergic
skin reaction to anaphylactic shock)
Digestive tract disorders (vomiting, diarrhoea)
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.
The veterinary medicinal product is not effective against beta-lactamase producing
organisms.
Cross-resistance has been shown between amoxicillin and other penicillins, in
particular amino-penicillins in bacteria susceptible to amoxicillin. Use of the veterinary
medicinal product/amoxicillin should be carefully considered when susceptibility
testing has shown resistance to penicillins because its effectiveness may be reduced.
The uptake of medication by animals can be altered as a consequence of illness. In
case of insufficient water uptake, animals should be treated parenterally instead
using a suitable injectable veterinary medicinal product prescribed by the
veterinarian.
Special precautions for safe use in the target species:
Use of the veterinary medicinal product should be based on susceptibility testing of the
target pathogen(s). If this is not possible, therapy should be based on epidemiological
information and knowledge of susceptibility of the target pathogens at farm level, or at
local/regional level. Use of the veterinary medicinal product should be in accordance
with official, national and regional antimicrobial policies. Use of the veterinary medicinal
product deviating from the instructions given in the SPC may increase the prevalence
of bacteria resistant to amoxicillin and may decrease its effectiveness and the
effectiveness of treatment with other penicillins, due to the potential for cross-
resistance.
Narrow spectrum antibiotic therapy with a lower risk of antimicrobial resistance
selection should be used for first line treatment where susceptibility testing suggests
the likely efficacy of this approach.
The antimicrobial should not be used as part of heard health programmes.
Not for use for prophylaxis.
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 veterinary medicinal product.
Handle this veterinary medicinal 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 gloves during preparation and administration of medicated water or liquid feed.
AN: 03033/2022Page 3 of 8
Wash hands after use. Wash any exposed skin after handling the veterinary medicinal
product or medicated water or feed.
In the event of eye or skin contact , rinse the affected area with large amounts of clean
water.
Do not smoke, eat or drink while handling the veterinary medicinal product. In case of
accidental ingestion, immediately rinse the mouth with water and seek medical advice.
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.
Special precautions for the protection of the environment:
Not applicable
organisms.
Cross-resistance has been shown between amoxicillin and other penicillins, in
particular amino-penicillins in bacteria susceptible to amoxicillin. Use of the veterinary
medicinal product/amoxicillin should be carefully considered when susceptibility
testing has shown resistance to penicillins because its effectiveness may be reduced.
The uptake of medication by animals can be altered as a consequence of illness. In
case of insufficient water uptake, animals should be treated parenterally instead
using a suitable injectable veterinary medicinal product prescribed by the
veterinarian.
Special precautions for safe use in the target species:
Use of the veterinary medicinal product should be based on susceptibility testing of the
target pathogen(s). If this is not possible, therapy should be based on epidemiological
information and knowledge of susceptibility of the target pathogens at farm level, or at
local/regional level. Use of the veterinary medicinal product should be in accordance
with official, national and regional antimicrobial policies. Use of the veterinary medicinal
product deviating from the instructions given in the SPC may increase the prevalence
of bacteria resistant to amoxicillin and may decrease its effectiveness and the
effectiveness of treatment with other penicillins, due to the potential for cross-
resistance.
Narrow spectrum antibiotic therapy with a lower risk of antimicrobial resistance
selection should be used for first line treatment where susceptibility testing suggests
the likely efficacy of this approach.
The antimicrobial should not be used as part of heard health programmes.
Not for use for prophylaxis.
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 veterinary medicinal product.
Handle this veterinary medicinal 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 gloves during preparation and administration of medicated water or liquid feed.
AN: 03033/2022Page 3 of 8
Wash hands after use. Wash any exposed skin after handling the veterinary medicinal
product or medicated water or feed.
In the event of eye or skin contact , rinse the affected area with large amounts of clean
water.
Do not smoke, eat or drink while handling the veterinary medicinal product. In case of
accidental ingestion, immediately rinse the mouth with water and seek medical advice.
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.
Special precautions for the protection of the environment:
Not applicable
The veterinary medicinal product should not be administered with antibiotics that
have a bacteriostatic mode of action, such as tetracyclines, macrolides,
sulphonamides as they can antagonise the bactericidal effect of penicillins.
Do not use simultaneously with neomycin since it blocks the absorption of oral
penicillins.
have a bacteriostatic mode of action, such as tetracyclines, macrolides,
sulphonamides as they can antagonise the bactericidal effect of penicillins.
Do not use simultaneously with neomycin since it blocks the absorption of oral
penicillins.
Do not refrigerate or freeze.
Store in the original container in order to protect from light.
Keep the container tightly closed.
Store in a dry place.
Store in the original container in order to protect from light.
Keep the container tightly closed.
Store in a dry place.
Chickens (meat & offal): 1 day
Ducks (meat & offal): 9 days
Turkeys (meat & offal): 5 days
Pigs (meat & offal): 2 days
AN: 03033/2022Page 6 of 8
Not authorised for use in laying birds producing eggs for human consumption. Do not
use within 4 weeks of the start of the laying period.
Ducks (meat & offal): 9 days
Turkeys (meat & offal): 5 days
Pigs (meat & offal): 2 days
AN: 03033/2022Page 6 of 8
Not authorised for use in laying birds producing eggs for human consumption. Do not
use within 4 weeks of the start of the laying period.
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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