AVM-GSL Over the Counter

Forketos Oral Solution for Cattle and Sheep

Active ingredients: Cobalt, Propylene Glycol

Form

Liquid

Species

Cattle Sheep

Manufacturer

Alfasan Nederland B.V.

VMD MA No.

36408/4015

What it's used for

Levacur SC 3% is a broad spectrum anthelmintic for the treatment and control of gastro-intestinal and pulmonary nematode infections in cattle and sheep. Le...

Full indications, dosage and side effects ↓

View official SPC (PDF)

The prescription itself has a price. See what practices near you charge for a consultation and the written prescription fee.

Paying less for Cobalt + Propylene Glycol

1

Ask your vet for a written prescription

They must provide one on request. Under the CMA Order the fee is capped at £21 from 2027.
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.

Your prescription rights → VMD register of retailers →

Clinical information

Forketos Oral Solution for Cattle and Sheep — SPC Details

Source: VMD Summary of Product Characteristics (SPC). Last updated 27 Mar 2026.

Levacur SC 3% is a broad spectrum anthelmintic for the treatment and control of
gastro-intestinal and pulmonary nematode infections in cattle and sheep.
Levacur SC 3% is effective against mature and developing immature stages of
the following levamisole-susceptible major nematode worm species:-
Gastro-intestinal Worms:
Trichostrongylus spp.,
Cooperia spp., Ostertagia spp. (except inhibited
Ostertagia larvae in cattle), Haemonchus spp.,
Nematodirus spp., Bunostomum spp.,
Oesophagostomum spp., Chabertia spp.

Revised: November 2025
AN: 02376/2025
Lungworms: spp.
Levacur SC 3% is not effective against Type II Winter scour.
The product also contains Selenium and Cobalt as nutritional supplements.

The product should only be administered as an oral drench.
Sheep: 2.5 ml per 10 kg (22 lbs) bodyweight
(7.5 mg Levamisole hydrochloride/kg bodyweight).
Practical dosage recommendations:
10 kg (22 lbs) 2.5 ml 40 kg (88 lbs) 10.0 ml
20 kg (44 lbs) 5.0 ml 50 kg (110 lbs) 12.5 ml
30 kg (66 lbs) 7.5 ml 60 kg (132 lbs) 15.0 ml
Sheep over 60 kg should be given a further 1 ml for each additional 4 kg bodyweight.
Cattle: 2.5 ml per 10 kg (22 lbs) bodyweight (7.5 mg Levamisole
hydrochloride/kg bodyweight)
Practical dosage recommendations
50 kg (1 cwt) 12.5 ml 200 kg (4 cwt) 50.0 ml
100 kg (2 cwt) 25.0 ml 250 kg (5 cwt) 62.5 ml
150 kg (3 cwt) 37.5 ml 300 kg (6 cwt) 75.0 ml

Veterinary advice should be sought:
- On appropriate dosing programmes and stock management to achieve

Revised: November 2025
AN: 02376/2025
adequate parasite control, and to reduce the likelihood of anthelmintic
resistance developing.
- If the product does not achieve the desired clinical effect, since other
diseases, nutritional disturbances or anthelmintic resistance may be
involved.
To ensure administration of the correct dose, body weight should be determined
as accurately as possible; accuracy of the dosing device should be checked.
Do not mix with other products.

Animals should not be treated simultaneously or within 14 days before or after
the use of Levacur SC 3% with Organophosphorus compounds or
diethylcarbamazine citrate.

Occasionally at the recommended dose cattle may show signs of lip-licking and
slight muscle tremor.

(i) Special precautions for use in animals
For oral use only

Revised: November 2025
AN: 02376/2025
Do not administer other cobalt and selenium supplements concurrently unless
specifically advised by your veterinary surgeon. Not to be diluted.
(ii) Special precautions to be taken by the person administering the medicinal
product to the animals
Levamisole can cause idiosyncratic reactions as well as serious blood disorders
in a very small number of people. If symptoms such as dizziness, nausea or
vomiting or abdominal discomfort are experienced when using this product, or
sore mouth /throat or fever occur shortly afterwards, then medical advice should
be sought immediately. Wash hands and exposed skin before meals and after
work. Remove any contaminated clothing immediately. Wash splashes from
eyes and skin immediately. When using do not eat, drink or smoke.

Animals should not be treated simultaneously or within 14 days before or after the
use of Levacur SC 3% with Organophosphorus compounds or
diethylcarbamazine citrate.

Do not store above 25
o
C. Store in the original container

Meat: zero days
Milk: zero hours5.

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.