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POM-VPS Prescription Required

Closiver 5 mg/ml + 125 mg/ml Solution for Injection for Sheep

Active ingredients: Closantel, Ivermectin

Form

Injection

Species

Sheep

Manufacturer

Norbrook Laboratories Limited

VMD MA No.

02000/4298

What it's used for

For the treatment of mixed trematode (fluke) and nematode or arthropod infestations due to gastrointestinal roundworms, trematodes, lungworms, nasal bots a...

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

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    The CMA found online pharmacies 50–60% cheaper than practice dispensing on common medicines — typically £200–£300 a year.

Prescription required

Your vet must provide a written prescription on request. You can then purchase from any licensed online retailer.

Clinical information

Closiver 5 mg/ml + 125 mg/ml Solution for Injection for Sheep — SPC Details

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

For the treatment of mixed trematode (fluke) and nematode or arthropod
infestations due to gastrointestinal roundworms, trematodes, lungworms, nasal bots
and mites of sheep.
Gastrointestinal roundworms
Teladorsagia circumcincta (including inhibited L4), Ostertagia trifurcata (adult and
L4), Haemonchus contortus (including inhibited L4), Trichostrongylus axei (adult),
Trichostrongylus colubriformis (adult and L4), T. vitrinus (adult)
(adult and L4), Oesophagostomum columbianum (adult and L4), O. venulosum

Revised: September 2015
AN. 01215/2014
(adult) (adult and L4) (adult and L4), Trichuris
ovis (adult).
[L4 = fourth stage larvae]
Lungworms
Dictyocaulus filaria (adult and 4
th
stage larvae)
Protostrongylus rufescens (adult)
Liver Fluke (Adults and 7 weeks immature)
Fasciola gigantica, Fasciola hepatica
Nasal Bots
Oestrus ovis
Mange Mites
Psoroptes ovis (Treatment require a second injection of an ivermectin-only product
7 days later. See sections 4.4 and 4.9)
Benzimidazole – resistant strains of and Teladorsagia
circumcincta
The product should be administered at a dosage rate of 200 g ivermectin per kg
bodyweight and 5 mg closantel per kg bodyweight (1 ml per 25 kg). It should only
be injected subcutaneously into the neck. A sterile 16-gauge, one-inch needle is
recommended.
For the treatment and control of sheep scab an injection of the product may be
administered but must be followed with a second injection of an ivermectin only
product seven days after the initial injection to treat clinical signs of scab and to
eliminate mites. This injection should be administered at the other side of the neck.
This product does not contain an antimicrobial preservative. Swab septum before
removing each dose. Use a dry sterile needle and syringe. For 250 ml and 500 ml
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.
Do not exceed 40 broachings per vial. If more than 40 broachings are required, use
of a draw off needle is recommended.
The timing for treatment should be based on epidemiological factors and should be
customised for each individual farm. As with other anthelmintics, veterinary advice
should be sought on appropriate dosing programmes and stock management to
achieve adequate parasite control and reduce the likelihood of resistance
developing.
To ensure administration of a correct dose, bodyweight should be determined as
accurately as possible; accuracy of the dosing device should be checked.
If animals are to be treated collectively rather than individually they should be
grouped according to their bodyweight and dosed accordingly, in order to avoid
under- or over-dosing.
Do not use intravenously or intramuscularly.
Do not use in cases of known hypersensitivity to the active substances or to any
other of the excipients.
Transitory swelling has occasionally been observed at the injection site.
Occasionally this swelling is accompanied by pain and discomfort. This swelling
resolves completely within 14 days following treatment.
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.
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 tests 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 and closantel has been reported in
in sheep. Therefore the use of this product should be based on local
epidemiological information about the susceptibility of the
and recommendations on how to limit further selection for resistance to
anthelmintics.

Revised: September 2015
AN. 01215/2014
Resistance to macrocyclic lactones has been reported in in sheep
in a number of countries
In sheep treatment of psoroptic mange (sheep scab) with one injection of this
product will not be effective in eliminating all the mites. A suitable ivermectin–only
injectable product must be administered seven days after the treatment with this
product to treat clinical signs and to eliminate the mites.
Sheep scab (Psoroptes ovis) is an extremely contagious external parasite of sheep.
To ensure complete control great care must be taken to avoid re-infestation, as
mites may be viable for up to 15 days off the sheep. It is important that all sheep
which have been in contact with infected sheep are treated with an appropriate
product. Contact between treated, infected and untreated flocks must be avoided
until at least seven days after treatment.

i. Special precautions for use in animals
Avermectins may not be well tolerated in all non-target species (cases of
intolerance with fatal outcome are reported in dogs – especially Collies, Old
English Sheepdogs and related breeds or crosses, and also in
turtles/tortoises).
ii. Special precautions to be taken by the person administering the veterinary
medicinal product to animals
Do not smoke, eat or drink 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 self-injection. Inadvertent self-injection
may result in local irritation and/or pain at the injection site.
accidental self-injection, seek medical advice immediately and show the label
or package leaflet to the physician
Do not administer concomitantly with chlorinated compounds. The effect of GABA
agonists are increased by ivermectin.

Revised: September 2015
AN. 01215/2014
Do not store above 25°C.
Protect from light.
Excipients:
Sodium formaldehyde sulphoxylate 5 mg
For the full list of excipients, see Section

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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