Skip to content
POM-V Prescription Required

Procactive 300 mg/ml Suspension for Injection for Cattle, Sheep and Pigs

Active ingredient: Procaine Benzylpenicillin

Form

Injection

Species

Cattle Pigs Sheep

Manufacturer

Laboratorios SYVA S.A.

VMD MA No.

31592/3000

What it's used for

For the treatment of systemic infections in cattle, sheep and pigs caused by or associated with bacteria susceptible to benzylpenicillin.

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 Procaine Benzylpenicillin

  1. 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. 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.

Prescription required

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

Clinical information

Procactive 300 mg/ml Suspension for Injection for Cattle, Sheep and Pigs — SPC Details

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

For the treatment of systemic infections in cattle, sheep and pigs caused by or
associated with bacteria susceptible to benzylpenicillin.
For intramuscular use. Shake well before use.
The recommended dosage rate is 10 mg/kg bodyweight procaine benzylpenicillin
(corresponding to 5.66 mg benzylpenicillin/kg bodyweight) equivalent to 1 ml per
30 kg bodyweight daily. The treatment duration is 3 to 7 days.
Do not inject more than 2.5 ml per injection site in pigs.
Do not inject more than 12 ml per injection site in cattle.
Do not inject more than 2 ml per injection site in sheep.
If no clinical response is seen within 3 days, redetermine the diagnosis and change
the treatment if necessary.
The appropriate treatment duration should be chosen based on the clinical needs
and individual recovery of the treated animal. Consideration should be given to the
accessibility of the target tissue and characteristics of the target pathogen.
To ensure a correct dosage, body weight should be determined as accurately as
possible to avoid underdosing.
The cap may be safely punctured up to 50 times.
Do not inject intravenously.
Do not use in known cases of hypersensitivity to penicillins, cephalosporins, procaine
or to any of the excipients.
Do not use in cases of severe renal dysfunction with anuria and oliguria.
Do not use in the presence of β-lactamase producing pathogens.
Do not use in very small herbivores such as guinea pigs, gerbils and hamsters.
In suckling and fattening pigs, pyrexia, vomiting, shivering, listlessness and
incoordination have been reported rarely, which may be caused by the release of
procaine.
Systemic toxic effects have been observed in young piglets, which are transient but
can be potentially lethal, especially at higher doses.
In pregnant sows and gilts, a vulvar discharge which could be associated with
abortion has been reported rarely.
In cattle, anaphylactic reactions have been reported rarely, which may be caused by
the content of povidone.
Penicillins and cephalosporins may cause hypersensitivity (allergy) following
administration of the product. Allergic reactions to these substances may
occasionally be serious and include anaphylactic shock.
In case of side effects, the animal has to be treated symptomatically.
The frequency of adverse reactions is defined using the following convention:
- very common (more than 1 in 10 animals treated displaying adverse reactions)
- 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).
Complete cross-resistance has been shown between benzylpenicillin procaine and
other penicillins.

Revised: January 2026
AN: 00471/2025
After absorption, benzylpenicillin poorly penetrates biological membranes (e.g.,
blood-brain barrier) since it is ionised and poorly lipid soluble. Use of the product for
treatment of meningitis or CNS infections due to e.g., Streptococcus suis or Listeria
monocytogenes may not be efficacious. Furthermore, benzylpenicillin penetrates
mammalian cells poorly and hence this product may have little effect in treating
intracellular pathogens e.g., Listeria monocytogenes.
Elevated MIC values or bi-modal distribution profiles suggesting acquired resistance
have been reported for the following bacteria:
- Glaesserella parasuis, Staphylococcus spp. causing MMA/PPDS, Streptococcus
spp. and S. suis in pigs;
- Fusobacterium necrophorum causing metritis and Mannheimia haemolytica (only in
some member states), as well as Bacteroides spp., Staphylococcus chromogenes,
Actinobacillus lignieresii and Trueperella pyogenes in cattle.
Use of the veterinary medicinal product may result in a lack of clinical efficacy when
treating infections caused by these bacteria.

Special precautions for use in animals
Administer by deep injection only.
The 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.
Official, national and regional antimicrobial policies should be taken into account
when the product is used.
Use of the product deviating from the instructions given in the SPC may increase the
prevalence of bacteria resistant to benzylpenicillin and may decrease the
effectiveness of treatment with other penicillins and cephalosporins due to the
potential for cross-resistance.
The feeding of waste milk containing residues of antibiotics to calves should be
avoided up to the end of the milk withdrawal period (except during the colostral
phase), because it could select antimicrobial-resistant bacteria within the intestinal
microbiota of the calf and increase the faecal shedding of these bacteria.
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 sensitivity to cephalosporins and vice versa. Allergic reactions to these
substances may occasionally be serious. This product also contains a paraben
preservative which may cause a contact hypersensitivity reaction in previously
sensitised individuals.
1. Do not handle this product if you know you are sensitised or if you have been
advised not to work with such preparations.
2. Handle this product with great care to avoid exposure, taking all recommended
precautions.

Revised: January 2026
AN: 00471/2025
3. 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 and
eyes or difficulty with breathing are more serious symptoms and require urgent
medical attention.
People developing a reaction after contact with the product should avoid handling the
product and other penicillin and cephalosporin containing products in the future.
It is recommended to wear gloves when handling and administering the product.
In case of accidental eye contact, rinse thoroughly with water.
In case of accidental skin contact wash exposed skin thoroughly with soap and
water.
In case of accidental self-injection, seek medical advice immediately and show the
package leaflet or the label to the physician.
The bactericidal efficacy of penicillin is counteracted by bacteriostatic medicinal
products.
The effect of aminoglycosides can be enhanced by penicillins.
The excretion of benzylpenicillin is prolonged by acetylsalicylic acid.
Cholinesterase inhibitors delay the degradation of procaine.
Store in a refrigerator (2ºC-8ºC).
Keep the vial/bottle in the outer carton in order to protect from light.
phase), because it could select antimicrobial-resistant bacteria within the intestinal
microbiota of the calf and increase the faecal shedding of these bacteria.
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 sensitivity to cephalosporins and vice versa. Allergic reactions to these
substances may occasionally be serious. This product also contains a paraben
preservative which may cause a contact hypersensitivity reaction in previously
sensitised individuals.
1. Do not handle this product if you know you are sensitised or if you have been
advised not to work with such preparations.
2. Handle this product with great care to avoid exposure, taking all recommended
precautions.

Revised: January 2026
AN: 00471/2025
3. 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 and
eyes or difficulty with breathing are more serious symptoms and require urgent
medical attention.
People developing a reaction after contact with the product should avoid handling the
product and other penicillin and cephalosporin containing products in the future.
It is recommended to wear gloves when handling and administering the product.
In case of accidental eye contact, rinse thoroughly with water.
In case of accidental skin contact wash exposed skin thoroughly with soap and
water.
In case of accidental self-injection, seek medical advice immediately and show the
package leaflet or the label to the physician.
4.6 Adverse reactions (frequency and seriousness)
In suckling and fattening pigs, pyrexia, vomiting, shivering, listlessness and
incoordination have been reported rarely, which may be caused by the release of
procaine.
Systemic toxic effects have been observed in young piglets, which are transient but
can be potentially lethal, especially at higher doses.
In pregnant sows and gilts, a vulvar discharge which could be associated with
abortion has been reported rarely.
In cattle, anaphylactic reactions have been reported rarely, which may be caused by
the content of povidone.
Penicillins and cephalosporins may cause hypersensitivity (allergy) following
administration of the product. Allergic reactions to these substances may
occasionally be serious and include anaphylactic shock.
In case of side effects, the animal has to be treated symptomatically.
The frequency of adverse reactions is defined using the following convention:
- very common (more than 1 in 10 animals treated displaying adverse reactions)
- 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).
4.7 Use during pregnancy, lactation or lay
There is no evidence that this product presents any particular hazard to the dam or
foetus.
The safety of the veterinary medicinal product has not been established during
pregnancy and lactation. However, in pregnant sows and gilts, a vulvar discharge
which could be associated with abortion has been reported.
Use during pregnancy and lactation only accordingly to the benefit/risk assessment
by the responsible veterinarian.

Revised: January 2026
AN: 00471/2025
4.8 Interaction with other medicinal products and other forms of interaction
The bactericidal efficacy of penicillin is counteracted by bacteriostatic medicinal
products.
The effect of aminoglycosides can be enhanced by penicillins.
The excretion of benzylpenicillin is prolonged by acetylsalicylic acid.
Cholinesterase inhibitors delay the degradation of procaine.
4.9 Amounts to be administered and administration route
For intramuscular use. Shake well before use.
The recommended dosage rate is 10 mg/kg bodyweight procaine benzylpenicillin
(corresponding to 5.66 mg benzylpenicillin/kg bodyweight) equivalent to 1 ml per
30 kg bodyweight daily. The treatment duration is 3 to 7 days.
Do not inject more than 2.5 ml per injection site in pigs.
Do not inject more than 12 ml per injection site in cattle.
Do not inject more than 2 ml per injection site in sheep.
If no clinical response is seen within 3 days, redetermine the diagnosis and change
the treatment if necessary.
The appropriate treatment duration should be chosen based on the clinical needs
and individual recovery of the treated animal. Consideration should be given to the
accessibility of the target tissue and characteristics of the target pathogen.
To ensure a correct dosage, body weight should be determined as accurately as
possible to avoid underdosing.
The cap may be safely punctured up to 50 times.
4.10 Overdose (symptoms, emergency procedures, antidotes), if necessary
In the case of overdose, central nervous symptoms and/or convulsions may occur.
4.11 Withdrawal periods
Pigs:
Meat and offal: 6 days for treatment duration 3-5 days
8 days for treatment duration 6-7 days
Cattle:
Meat and offal: 6 days for treatment duration 3-5 days
8 days for treatment duration 6-7 days
Milk: 96 hours (4 days)
Sheep:
Meat and offal: 4 days for treatment duration 3-5 days
6 days for treatment duration 6-7 days
Milk: 156 hours (

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.

Medication costs adding up?

Pet insurance can cover prescription medications. Find the right policy for your pet.

Compare insurance

Find cheaper vets near you

Compare vet consultation prices in your area. Save on procedures and get a prescription to buy medications online.