Ivomec Sheep Drench is a widely used, broad-spectrum oral antiparasitic containing 0.8 mg/mL ivermectin, designed to control gastrointestinal roundworms, lungworms, and nasal bots in sheep. It is highly effective against benzimidazole-resistant parasites and is safe for pregnant ewes and lambs. 
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Key Details and Dosage
Withdrawal Period: Treated sheep must not be slaughtered for human consumption for at least 14 days after the last treatment. 
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Active Ingredient: Ivermectin (0.08% w/v).
Dosage: Administer orally at a rate of 2.5 mL per 10 kg (22 lb) of body weight. A 3 mL per 26 lb dosage is also commonly used.
Administration:
 Ready-to-use oral drench formula.
Indications (What it treats)
Gastrointestinal Nematodes: Adults and immatures of Haemonchus contortus, Ostertagia circumcincta, Trichostrongylus species, and others.
Lungworm: Adult and immature Dictyocaulus filaria.
Nasal Bots: All larval stages of Oestrus ovis. 
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Important Safety and Usage Information
Safety: Safe to use in all classes of sheep, including breeding rams, pregnant ewes, and young lambs.
Environmental Warning: Do not contaminate water with the product or containers.
Storage: Keep out of reach of children.