An off-white aqueous suspension containing:
Oxfendazole 2.265% w/v

Uses:
A broad-spectrum anthelmintic for the control of mature and developing immature gastrointestinal roundworms and lungworms and also tapeworms in sheep. Parafend is ovicidal for strongyle eggs.

For the treatment of sheep infested with benzimidazole susceptible strains of the following species:

Gastrointestinal Roundworms: Ostertagia spp, Haemonchus spp, Nematodirus spp, Trichostrongylus spp, Cooperia spp, Oesophagostomum spp and Chabertia spp. Also provides useful control of Trichuris spp.

Lungworms: Dictyocaulus spp.
Tapeworms: Moniezia spp.

In sheep it is also effective against inhibited/arrested larvae of Nematodirus spp, and benzimidazole susceptible Haemonchus spp and Ostertagia spp.

Dosage & Administration 
Sheep: 5.0mg oxfendazole per kg bodyweight. 

Withdrawal Period 
Animals should not be slaughtered for human consumption during treatment. Sheep may be slaughtered for human consumption only after 10 days from the last treatment. Not for use in sheep producing milk for human consumption. 

Contraindictions, Warnings etc
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:

Too frequent and repeated use of anthelmintics from the same class, over an extended period of time.
Under dosing, 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 benzimidazoles has been reported in Teladorsagia, Haemonchus, Cooperia and Trichostongylus species in small ruminants. Therefore the use of this product should be based on local (regional, farm) epidemiological information about susceptability of nematode and recommendations on how to limit further selection for resistance to anthelmintics.

The bodyweight of animals should be assessed as accurately as possible before calculating the dosage.

Please see below link to the Veterinary Medicines Product Information Database
http://www.vmd.defra.gov.uk/productinformationdatabase/Default.aspx