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Crystapen 5 Mega Units 3g solution for injection for horses


Out of stock

Crystapen 5 Mega Units 3 g. Powder for solution for injection.


1 vial of white crystalline powder for solution for injection contains 3 g of Benzylpenicillin (as Benzylpenicillin Sodium 95.7% w/w) equivalent to 5 mega-units of benzylpenicillin.


For use in horses.

For the treatment and control of acute and severe systemic infections caused by or associated with organisms sensitive to penicillin including: Arcanobacterium pyogenes, Erysipelothrix rhusiopathiae, Klebsiella pneumoniae, Listeria spp., Mannheimia haemolytica, Pasteurella multocida, Proteus spp., Pseudomonas aeruginosa, Rhodococcus equi, Staphylococcus aureus, Streptococcus zooepidemicus, some Salmonella spp.

The product may be used in pregnant and lactating animals.

Dosage and administration

The recommended dosage is 10 mg/kg twice daily for 1 day by intravenous injection. The usual aseptic precautions should be followed. The following guide is given to enable practical dose volumes to be administered.





water volume

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Volume of


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Note: Each vial contains 3g of benzylpenicillin

To ensure a correct dosage, bodyweight should be determined as accurately as possible to avoid underdosing.

Contra-indications, warnings, etc

Do not use in known cases of hypersensitivity to penicillins. Do not use in small mammals (eg. gerbils, rabbits).

Penicillins 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. Do not use in animals known to be sensitive to penicillin.

Adverse reactions include hypersensitivity in susceptible animals and diarrhoea.

The usual aseptic precautions should be followed when administering the product. Not for intrathecal administration.

Use of the product should be based on susceptibility testing of 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.

Operator warnings

Care should be taken to avoid accidental self-injection.

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.

Do not handle this product if you know you are sensitive to penicillins, or if you have been advised not to work with such preparations.

Handle this product with great care to avoid exposure, taking all recommended precautions.

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.

Wash hands thoroughly after use.

Withdrawal periods

Not to be used in horses intended for human consumption.

Treated horses may never be slaughtered for human consumption.

The horse must have been declared as not intended for human consumption under national horse passport legislation.

For animal treatment only. Keep out of the reach and sight of children.

Pharmaceutical precautions

Do not store above 25ºC.

Reconstituted solutions may be stored for a maximum of 24 hours at 2-8ºC.

Disposal advice

Any unused veterinary medicinal product or waste material derived from such veterinary medicinal products should be disposed of in accordance with local requirements.

Legal category


Packaging Quantities

Glass vial with (type III) grey rubber bromobutyl bung with aluminium overseal containing powder for reconstitution.

Dilution of crystapen? Please speak to the prescribing veterinary surgeon

Shipping charges mainland GB zone1

Value Weight Delivery Charge
Over £49.00 Any Weight FREE
Under £49.00 No weight limit £4.50
Under £49.00 Under 250 grams £3.49

Most orders are despatched the same day and standard delivery is 3 to 5 working days from despatch. FAST Expedited options are available at extra cost - these usually arrive in 24-48hrs from dispatch but delays are possible during busy periods.

Postcodes outside of Zone 1 (including some areas within mainland UK) may incur extra carriage charges due to surcharges imposed by the couriers. These will be calculated on the website at the checkout.

NB: Orders placed with faster delivery must be placed before 13:00 to ensure same day dispatch (excluding weekends and bank holidays). Please also check on the product page that the items ordered show 'In Stock' otherwise your order will be delayed until the stock becomes available, which in most cases will only be 24hrs.

Estimated "Usually shipped in" information is shown against most products

Overseas orders

We no longer send goods outside of the UK.

Prescription Items

Prescription items will be sent on receipt of a valid signed and dated prescription.

Pick up

We offer a pickup service for orders placed over the phone.

Please ring us on 01833 641112 for more information.

Refrigerated Items

Refrigerated items will be sent by carrier or express delivery at a cost of £7.50, with coolpacks, unless you pay for a premium for a refrigerated delivery. We will contact you prior to despatch for your instructions.

We want you to be completely satisfied with any purchase. If not any item* can be returned to us within 14 days of receipt for exchange or refund Please give us a ring for a returns number on 01833 641112 or alternatively email sales@hyperdrug.co.uk to obtain a returns number.

*Due to legal requirements medicines may not be returned except to correct an error in despatch or in response to an "official recall". If an item is believed to be faulty it should be returned for inspection and it may be necessary to forward it to the manufacturers for testing before replacements or refunds can be authorised. This does not infringe legal rights. Please contact our customer services for a "Returns Number" which must appear on the outside of the package or it will not be accepted. We advise customers to use an insured method of shipping and to retain proof of despatch. We may refuse returns on products specially obtained or manufactured to order. Items must be returned unsoiled and unused and sent adequately packed and carriage paid.

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