Dectomax 10 mg/ml Solution for Injection for Cattle and Sheep
Active ingredient: Doramectin
Form
Injection
Species
Manufacturer
C&H Generics Ltd
VMD MA No.
40162/3002
What it's used for
CATTLE For treatment of infestations of gastrointestinal roundworms, lungworms, eyeworms, warbles, lice and mange mites. Gastrointestinal roundworms (adult...
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Dectomax 10 mg/ml Solution for Injection for Cattle and Sheep — SPC Details
Source: VMD Summary of Product Characteristics (SPC). Last updated 26 Mar 2026.
For treatment of infestations of gastrointestinal roundworms, lungworms, eyeworms,
warbles, lice and mange mites.
Gastrointestinal roundworms (adults and fourth stage larvae)
Ostertagia ostertagi (inc. inhibited larvae)
O. lyrata*
Haemonchus placei
Trichostrongylus axei
T. colubriformis
Cooperia oncophora
C. pectinata*
Revised: November 2025
AN: 02515/2025
C. punctata
C. surnabada (syn. mcmasteri)
Nematodirus spathiger*
Bunostomum phlebotomum*
Strongyloides papillosus*
Oesophagostomum radiatum
Trichuris spp
* adults
Lungworms (adults and fourth stage larvae)
Dictyocaulus viviparus
Eyeworms (adults)
Thelazia
Warbles (parasitic stages)
Hypoderma bovis,
H. lineatum
Sucking lice
Haematopinus eurystemus,
Linognathus vituli,
Solenopotes capillatus
Mange mites
Psoroptes bovis,
Sarcoptes scabiei,
May also be used as an aid in the control of Nematodirus helvetianus, biting lice
(Damalinia bovis) and the mange mite Chorioptes bovis.
The pharmacokinetics of Dectomax Solution for Injection allows protection of cattle
against infection or re-infection with the following parasites for the period
indicated:
SpeciesDaysOstertagia ostertagi35Cooperia oncophora21Dictyocaulus viviparus35Bunostomum phlebotomum22Oesophagostomum radiatum21Trichostrongylus axei28Linognathus vituli28Psoroptes bovis42Haemonchus placei28
Revised: November 2025
AN: 02515/2025
To obtain optimal benefits from the action of Dectomax Solution for Injection, it is
recommended that cattle which are set-stocked should be treated at turnout and
eight weeks later. Studies have demonstrated that, used in this way, Dectomax
will reduce the build-up of infective larvae on pasture and can protect animals from
parasitic gastro-enteritis and parasitic bronchitis throughout the grazing season.
To obtain these results, all animals must be included in the programme and
untreated cattle must not be introduced on the pasture. Treated cattle should
always be monitored according to good husbandry practices. Treatment with
Dectomax Solution for Injection at turnout and eight weeks later of cattle set-
stocked for the grazing season can protect against clinical disease caused by
lungworm and may allow the development of naturally acquired immunity.
However, due to the unpredictable nature of lungworm epidemiology, clinical signs
of lungworm disease may on occasion be seen, particularly towards the end of the
grazing season, if the
season is long. If this occurs, cattle should be further treated with an
anthelmintic effective against lungworm.
SHEEP:
For treatment and control of Psoroptes ovis (sheep scab mite) and for the
treatment and control of gastrointestinal roundworms and nasal bots.
Mange mites
Psoroptes ovis
Gastrointestinal roundworms (Adults and fourth stage larvae (L4) unless
otherwise indicated):
Chabertia ovina (adults only)
Cooperia curticei (L4 only)
C. oncophora
Gaigeria pachycelis
Haemonchus contortus
Nematodirus battus (L4 only)
Ostertagia (Teladorsagia) circumcincta *
Oesophagostomum columbianum
Strongyloides papillosus
Trichostrongylus axei
Trichostrongylus colubriformis
Trichostrongylus vitrinus
Trichuris spp (Adults only)
* Inhibited larval stages (L4) including strains that are benzimidazole
resistant, are also controlled.
For effective treatment and control of both adults and L4 larvae of
Nematodirus battus a dose rate of 300 mcg/kg is required.
Lungworms
Dictyocaulus filaria (Adults only)
Nasal bots (1st, 2nd and 3rd instar larvae)
Revised: November 2025
AN: 02515/2025
Oestrus ovis
occur. In common with other avermectins, certain breeds of dog, such as
collies, are especially sensitive to doramectin and particular care should be
taken to avoid accidental consumption of the product.
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 the national competent authority via
the national reporting system. See also the last section of the package leaflet for
contact details.
the risk of development of resistance and could ultimately result in ineffective
therapy:
• Too frequent and repeated use of anthelmintics from the same class, over
an extended period of time.
• Underdosing, which may be due to underestimation of body weight,
misadministration of the product, or lack of calibration of the dosing device
(if any).
Suspected clinical cases of resistance to anthelmintics should be further
investigated using appropriate tests (e.g. Faecal Egg Count Reduction Test).
Where the results of the test(s) strongly suggest resistance to a particular
anthelmintic, an anthelmintic belonging to another pharmacological class and
having a different mode of action should be used.
Resistance to doramectin (an avermectin) has been reported in Teladorsagia
and Haemonchus in sheep within the EU. Therefore, the use of this product
should be based on local (regional, farm) epidemiological information about
susceptibility of nematodes and recommendations on how to limit further
selection for resistance to anthelmintics.
i) Special precautions for use in animals
This product does not contain an antimicrobial preservative.
Swab septum before removing each dose.
Use sterile equipment and follow aseptic procedures.
When treating groups of animals, use only the Dectomax automatic dosing device
and vented draw-off apparatus.
For the treatment of individual sheep a disposable 2 ml syringe calibrated in
increments of 0.1 ml should be used.
In young lambs of less than 16 kg bodyweight seek veterinary advice regarding
the use of appropriate sized needles and of 1 ml disposable syringes graduated in
increments of 0.1 ml or less.
Revised: November 2025
AN: 02515/2025
Syringes must be filled from the vial through a dry, sterile draw-off needle that has
been placed in the vial stopper. Vial stoppers must not be broached more than 20
times.
ii) Special precautions to be taken by the person administering the veterinary
medicinal product to animals
Do not eat, drink or smoke while handling the product.
Wash hands after use.
Take care to avoid accidental self administration - seek medical attention should
any specific signs be noticed.
Advice to Medical Practitioners: In cases of accidental self injection specific
symptoms have rarely been observed and therefore any cases should be treated
symptomatically.
iii) Other precautions
Doramectin is very toxic to dung fauna and aquatic organisms and may
accumulate in sediments.
The risk to aquatic ecosystems and dung fauna can be reduced by avoiding too
frequent and repeated use of doramectin (and products of the same anthelmintic
class) in cattle and sheep.
The risk to aquatic ecosystems will be reduced by keeping treated cattle away
from water bodies for five weeks after treatment.
Do not freeze. Do not refrigerate.
Meat and offal: 70 days
Not permitted for use in lactating animals producing milk for human
consumption.
Do not use in pregnant cows or heifers, which are intended to produce milk for
human consumption, within 2 months of expected parturition.
SHEEP:
Meat and offal: 70 days
Not permitted for use in lactating animals producing milk for human
consumption.
Do not use in pregnant ewes, which are intended to produce milk for human
consumption, within 70 days of expected parturition.
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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Related Conditions
Other Products Containing Doramectin
These products share the same active ingredient and may be suitable alternatives. Always consult your vet.
Dectomax 10 mg/ml Solution for Injection for Cattle and Sheep
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Dectomax 5 mg/ml Pour-on Solution for Cattle
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Dectomax 5 mg/ml Pour-on Solution for Cattle
POM-VPSC&H Generics Ltd
Doramax 10 mg/ml Solution for Injection for Cattle and Sheep
POM-VPSC&H Generics Ltd
Doramax 10 mg/ml Solution for Injection for Cattle and Sheep
POM-VPSC&H Generics Ltd
Doramax 5 mg/ml Pour-on Solution for Cattle
POM-VPSC&H Generics Ltd
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