For the treatment and control of blowfly strike in sheep and lambs, and for the treatment of lice and ticks on sheep. 

Use:
Blowfly - For the control of blowfly a single application will normally provide 8 to 10 weeks protection.
re-treatment may be necessary after this period.  
For the treatment of blowfly strike, a single treatment applied to the infected area will ensure blowfly larvae are killed.

Ticks - A single treatment will normally provide control of ticks for 8 to 12 weeks.

Headfly - A single treatment will reduce the incidence for up to 6 weeks. 

Lice - A single treatment will normally kill all lice.  

Dosage & Administration
For dosages of 40 and 25ml, apply as two half-doses. Apply the first half-dose evenly along the back line from the neck to the saddle, and the second half-dose evenly from the saddle to the tail head and around the rump. For the control of blowfly it is important that there is good coverage around the tail area. 

Withdrawal Period 
Meat - 49 days.
Milk - Not for use in sheep producing milk for human consumption.

Contraindictions, Warnings etc
Avoid treating animals in hot weather. Do not treat sheep producing milk for human consumption. Do not treat lambs under one week old. Discolouration of the fleece may be observed in some sheep from approximately 6 to 8 weeks after treatment. 

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