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Molemec Injection 10 mg/ml Solution for Injection for Cattle, Sheep and Pigs.

Active ingredient: Ivermectin

Form

Injection

Species

Cattle Pigs Sheep

Manufacturer

Norbrook Laboratories Limited

VMD MA No.

02000/4261

What it's used for

Cattle: For the treatment and control of the following species of gastrointestinal roundworms, lungworms, eyeworms, warbles, mites and sucking lice in beef...

Full indications, dosage and side effects ↓
View official SPC (PDF)

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  1. 1

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  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

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Clinical information

Molemec Injection 10 mg/ml Solution for Injection for Cattle, Sheep and Pigs. — SPC Details

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

Cattle:
For the treatment and control of the following species of gastrointestinal
roundworms, lungworms, eyeworms, warbles, mites and sucking lice in beef cattle
and non-lactating dairy cattle.
Gastrointestinal Roundworms (adults and fourth stage larvae):
Ostertagia ostertagi ),
placei, ,
Cooperia punctata, Cooperia pectinata, Bunostomum phlebotomum,
Oesophagostomum radiatum, Strongyloides papillosus Nematodirus
helvetianus (adult), Nematodirus spathiger , and Trichuris spp (adults)
Lungworms
Dictyocaulus viviparus
Eyeworms (adult):
Thelazia spp
Warbles (parasitic stages):
Hypoderma bovis, Hypoderma lineatum

Revised: March 2026
AN: 04398/2025Page 2 of 8
Sucking Lice:
Linognathus vituli, Haematopinus eurysternus, Solenopotes capillatus
Mange Mites:
Psoroptes bovis, Sarcoptes scabiei
The product may also be used as an aid in the control of the biting louse
bovis, but complete elimination may not
occur.
When cattle have to graze on pasture contaminated with infective larvae of cattle
nematodes, treatment at the recommended dose rate controls re-infection with
Haemonchus placei, Cooperia
days after treatment,
acquired up to 21 days after treatment and acquired up to 28
days after treatment.
Sheep:
For the treatment and control of psoroptic mange (sheep scab), gastrointestinal
nematodes, lungworms and nasal bots of sheep.
At the recommended dosage level of 200 mcg ivermectin per kg bodyweight the
product effectively controls the following parasites of sheep:
Gastrointestinal Roundworms (adults and fourth stage larvae):
Ostertagia circumcincta, ,
(adults), , Cooperia
curticei, Oesophagostomum venulosum, Oesophagostomum columbianum,
Nematodirus filicollis, Chabertia ovina, Trichuris ovis (adults)
Inhibited larval stages and benzimidazole resistant strains of
contortus and are also controlled.
Lungworms
Dictyocaulus filaria (adults and fourth stage larvae), Protostrongylus rufescens
(adults).
Mange Mites:
Psoroptes ovis
Nasal Bot:
Oestrus ovis (all larval stages)
Pigs:
For the treatment and control of the harmful species of gastrointestinal roundworms,
lungworms, lice and mange mites of pigs. At the recommended dose rate of 300
g/kg the product provides effective control of the following parasites:
Gastrointestinal Worms:
Ascaris suum (adults and fourth-stage larvae)
Hyostrongylus rubidus
Oesophagostomum spp. (adults and fourth-stage larvae)

Revised: March 2026
AN: 04398/2025Page 3 of 8
Strongyloides ransomi
Lungworms:
Metastrongylus spp (adults)
Lice:
Haematopinus suis
Mange Mites:
Sarcoptes scabiei var suis
The product may also be used as an aid in the control of adult whipworm (Trichuris
suis).
To ensure administration of a correct dose, body weight should be determined as
accurately as possible; accuracy of the dosing device should be checked.
Cattle:
Ivermectin should be administered at a dosage rate of 200 g per kg bodyweight (1
ml to 50 kg bodyweight). It should only be injected subcutaneously in front of or
behind the shoulder using aseptic technique. A sterile 17 gauge x ½ inch needle is
recommended.

Revised: March 2026
AN: 04398/2025Page 5 of 8
Sheep:
Administer only by subcutaneous injection in the neck at the recommended dosage
level of 200 g ivermectin per kg bodyweight using aseptic technique. Each ml
contains 10 mg ivermectin to treat 50 kg of bodyweight. Swab the septum before
removing each dose. Use a dry sterile needle and syringe.
Administer subcutaneously only. Inject once under the loose skin in the neck. For
the treatment and control of sheep scab (Psoroptes ovis) two injections with a
seven day interval are required to treat clinical signs of scab and eliminate living
mites. Use of a 17 gauge x ½ inch (15-20 mm) needle is suggested. Replace with
a fresh sterile needle after every 10-12 animals. Injection of wet or dirty animals is
not recommended.
When treating sheep of less than 16 kg seek veterinary advice regarding the use of
1 ml disposable syringes graduated in increments of 0.1 ml.
For the treatment of individual sheep a syringe not exceeding 2.0 ml and calibrated
in increments of 0.1 ml should be used.
Pigs:
Administer at a dosage rate of 300 µg per kg bodyweight (1 ml per 33 kg). The
product should be injected subcutaneously into the neck using aseptic technique. A
sterile 17 gauge x ½ inch needle is recommended.
This product does not contain an antimicrobial preservative. Swab septum before
removing each dose. Use a dry sterile needle and syringe. For 250 ml, 500 ml and
1 litre pack sizes, use of a multiple dose syringe is recommended. To refill the
syringe, use of a draw-off needle is recommended to avoid excessive broaching of
the stopper. Avoid introduction of contamination.
The product is for administration only by the subcutaneous route and must not be
given via other routes. It should not be used in other species than those indicated
as severe reactions, including fatalities in dogs, may occur.
Transitory discomfort has been observed in some cattle following subcutaneous
administration. Tissue swellings at the injection site have been observed. These
reactions resolve without treatment.
See also 4.10.
Immediately following subcutaneous injection, activity suggesting pain, sometimes
intense but usually transient, has been observed in some sheep.
Care should be taken to avoid the following practices because they increase the
risk of development of resistance and could ultimately result in ineffective therapy:
•
extended period of time.
•
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 ivermectin (an avermectin) has been reported in
sheep and goats within the EU and it is common in in sheep outside
the EU. It has been reported in
Teladorsagia in cattle in developed countries such as New Zealand and
Haemonchus in cattle outside the EU. Therefore the use of this product should be
based on local (regional, farms) epidemiological information about susceptibility of
nematodes and recommendations on how to limit further selection for resistance to
anthelmintics.

Revised: March 2026
AN: 04398/2025Page 4 of 8

i. Special precautions for use in animals
In pigs, especially those under 16 kg for which less than a volume of 0.5 ml is
indicated, dosing accuracy is important. The use of a suitably calibrated syringe
that can accurately deliver 0.1 ml is recommended.
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.
Direct contact of the product with the skin should be kept to a minimum. Wash
hands after use.
Take care to avoid accidental self-injection: this product may cause local irritation
and/or pain at the injection site.
None identified.
Do not store above 25°C.
Protect from light.
Following withdrawal of the first dose use the product within 28 days. Discard
unused material.
Cattle:
Meat and offal: 49 days.
Do not use in cows producing milk for human consumption.
Do not use in non-lactating dairy cows including pregnant heifers within 60
days of calving.
Pigs:
Meat and offal: 28 days.
Sheep:
Meat and offal: 42 days.
Do not use in lactating ewes producing milk for human consumption.
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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