Cemay 50 mg/ml Suspension for Injection for Pigs and Cattle
Active ingredient: Ceftiofur
Form
Injection
Species
Manufacturer
Laboratorios Maymo S.A.U.
VMD MA No.
42204/4000
What it's used for
Infections associated with bacteria sensitive to ceftiofur: In pigs: - multocida, and Streptococcus suis. In cattle: - haemolytica, Pasteurella multocida a...
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Prescription required
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Cemay 50 mg/ml Suspension for Injection for Pigs and Cattle — SPC Details
Source: VMD Summary of Product Characteristics (SPC). Last updated 26 Mar 2026.
In pigs:
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multocida, and Streptococcus suis.
In cattle:
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haemolytica, Pasteurella multocida and Histophilus somni
-
associated with
(Porphyromonas asaccharolytica).
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metritis within 10 days after calving associated with ,
pyogenes (Arcanobacterium pyogenes) ,
sensitive to ceftiofur
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has failed.
3 mg ceftiofur /kg bw/day, corresponding to 1 ml/16 kg bw/day, for 3 days.
Cattle: subcutaneous use
-Respiratory disease: 1 mg ceftiofur /kg bw/day, corresponding to 1 ml/50 kg bw/day
for 3 to 5 days.
-Acute interdigital necrobacillosis: 1 mg/kg bw/day, corresponding to 1 ml/50 kg
bw/day for 3 consecutive days.
-Acute post-partum metritis within 10 days after calving: 1 mg/kg bw/day,
corresponding to 1 ml/50 kg bw/day for 5 consecutive days.
In case of acute post-partum metritis, additional supportive therapy might be required
in some cases.
A maximum volume of 6 ml may be administered in each injection site.
Subsequent injections must be given at different sites.
To ensure a correct dosage body weight should be determined as accurately as
possible to avoid underdosing.
As the vial cannot be broached more than 40 times, the user should choose the more
appropriate vial size.
Shake the bottle well for 30 seconds before use to bring the veterinary medicinal
product back into suspension.
Revised: January 2025
AN: 00366/2024 & 00583/2024
antibiotics or to any of the excipients
Do not inject intravenously.
Do not use in poultry (including eggs) due to risk of spread antimicrobial resistance to
humans.
Do not use in cases where resistance to ceftiofur or to other cephalosporins or beta-
lactam antibiotics has occurred
Revised: January 2025
AN: 00366/2024 & 00583/2024
In very rare cases the following adverse reactions may occur:
-
-
of allergic reaction the treatment should be withdrawn.
Revised: January 2025
AN: 00366/2024 & 00583/2024
-In pigs, mild reactions at the injection site, such as residual lesions in the
intermuscular connective tissue consisting of round clear areas, have been
observed in some animals for up to 20-22 days after injection.
-In cattle, mild inflammatory reactions at the injection site, such as tissue oedema
and discoloration of the subcutaneous tissue and/or fascial surface of the muscle
may be observed.
days after injection, although slight tissue discoloration may persist for 32 days or
more.
The frequency of adverse reactions is defined using the following convention:
- Very common (more than 1 in 10 animals displaying adverse reaction(s) during the
course of one treatment).
- Common (more than 1 but less than 10 animals in 100 animals).
- Uncommon (more than 1 but less than 10 animals in 1,000 animals).
- Rare (more than 1 but less than 10 animals in 10,000 animals).
- Very rare (less than 1 animal in 10,000 animals, including isolated reports).
Special precautions for use in animals
Cemay selects for resistant strains such as bacteria carrying extended spectrum
betalactamases (ESBL) and may constitute a risk to human health if these strains
disseminate to humans e.g. via food. For this reason, Cemay should be reserved for
the treatment of clinical conditions which have responded poorly, or are expected to
respond poorly (refers to very acute cases when treatment must be initiated without
bacteriological diagnosis) to first line treatment. Official, national and regional
antimicrobial policies should be taken into account when the product is used.
Increased use, including use of the product deviating from the instructions given in
the SPC, may increase the prevalence of such resistance. Whenever possible,
Cemay should only be used based on susceptibility testing.
Cemay is intended for treatment of individual animals. Do not use for disease
prevention or as a part of herd health programmes. Treatment of groups of animals
should be strictly restricted to ongoing disease outbreaks according to the approved
conditions of use.
Do not use as prophylaxis in case of retained placenta.
Special precautions to be taken by the person administering the 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.
Do not handle this product if you know you are sensitised, or if you have been
advised not to work with such preparations.
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.
Handle this product with great care to avoid exposure. Wash hands after use.
In case of accidental self-injection, seek medical advice immediately and show the
package leaflet or the label to the physician.
of bacteriostatic antibiotics (macrolides, sulphonamides and tetracyclines).
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Cattle:
- Meat and offal: 8 days
- Milk: zero hours.
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.
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Other Products Containing Ceftiofur
These products share the same active ingredient and may be suitable alternatives. Always consult your vet.
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POM-VAlfasan Nederland B.V.
Cevaxel-RTU 50 mg/ml, Suspension for Injection for Cattle and Pigs
POM-VCeva Sante Animale
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