Local Storage seems to be disabled in your browser.
For the best experience on our site, be sure to turn on Local Storage in your browser.

Neopen 250 ml

MSD Intervet
An off-white suspension of procaine penicillin in a solution of neomycin sulphate
More info


Neomycin 100mg/ml, procaine benzylpenicillin 200mg/ml


For the treatment of infectious diseases in horses, sheep, pigs, dogs and cats caused by bacteria sensitive to the combination. The combination shows a broad spectrum of activity.


Do not use in animals known to be allergic to penicillin or neomycin.
Do not administer by the intravenous route.


Overdosage with neomycin parenterally can cause renal damage and deafness but this is unlikely at normal therapeutic dosage levels.
Occasionally in sucking and fattening pigs, administration of this product may cause a transient pyrexia, vomiting, shivering, listlessness and incoordination.
Additionally in pregnant sows and gilts, a vulval discharge which could be associated with abortion has been reported.
Allergic reactions have been observed occasionally
Local reaction (swelling) may occur at the injection site in horses for up to a week after administration.
Occasional, potentially fatal reactions associated with the administration of procaine penicillin in horses have been observed.

Dosage and administration

The recommended dosage level is:

For horses: 5 ml/ 100kg of body weight
For sheep: 1 ml/ 20 kg of body weight
For pigs: 1 ml/ 20 kg of body weight
For dogs: 1 ml/ 10 kg of body weight
For cats: 0.5 ml/ 5 kg of bodyweight

The dose should be repeated at 24 hours intervals as required to a maximum of three doses.
Administration should be by  intramuscular or subcutaneous injection in al species.

Precautions of storage

Store at between +2°C to +8°C

More Information
Registration numberREG NL 1556
BrandMSD Intervet
Chilled itemYes
Target speciesHorse
Legal status of supplyUDD
Withdrawal periodCattle meat: 89 days, milk: 5 days, Pigs meat and offal: 50 days, sheep: meat and offal: 62 days.
Units per outer box12
Ingredients Each ml Neopen contains: neomycin 100mg/ml, procaine benzylpenicillin 200mg/ml
© 2021 Grovet B.V. All rights reserved.