Coopers Flexolt Oral Lice Treatment For Sheep

Coopers Flexolt Oral Lousicide for Sheep

Coopers Flexolt is an advanced oral lousicide formulated for the strategic control of biting lice (Bovicola ovis) in sheep of all ages. It contains monepantel 25 mg/mL, a unique amino-acetonitrile derivative (AAD) anthelmintic that delivers systemic knockdown of lice after a single oral dose. Flexolt is the only product of its class registered for lice control via oral administration, ensuring whole-body protection without relying on external application methods.

Administered through standard drenching equipment, Flexolt provides rapid and reliable elimination of biting lice in both shorn and unshorn mobs. The product is not affected by rainfall, fleece length, fibre contamination, or jetting technique. It integrates seamlessly into normal drench programmes, making it highly versatile for mixed-age and mixed-management sheep operations.

Flexolt is ideal for producers seeking a resistance-breaking solution, offering a novel mode of action that avoids cross-resistance issues seen with synthetic pyrethroids, neonicotinoids, and insect growth regulators. With no wool withholding period and compatibility with standard management practices, Flexolt simplifies flock-wide lice control without compromising wool quality.

Coopers Flexolt Features

Unique Oral System for Whole-Body Coverage

Provides complete systemic control of biting lice via a single oral dose, eliminating dependence on external application or fleece penetration.

Novel Mode of Action

Powered by monepantel (AAD class), offering a resistance-breaking option where traditional lousicides have reduced efficacy.

Effective on Shorn and Unshorn Sheep

Delivers consistent performance across wool lengths; ideal for use on unshorn lambs, mixed-age mobs, or when shearing timing is restricted.

Rainfast and Fleece-Independent

Efficacy is not compromised by rain, dust, fleece contaminants, lanolin levels, or variable jetting technique.

Flexible Integration Into Drench Programmes

Can be administered alongside routine drenching, reducing labour and enabling seamless inclusion in flock health plans.

No Wool Withholding Period

Safe for use in wool-producing flocks without affecting wool quality, marketability, or processing characteristics.

Controls Lice Across the Entire Mob

Ideal for whole-flock treatments, preventing reinfestation and supporting long-term lice eradication strategies.

Safe for All Ages

Suitable for lambs, hoggets, ewes, and rams; provides an option for lice control in young sheep that cannot be treated topically prior to shearing.

Flexolt Product Information

• Active Constituent:
  • Monepantel 25 mg/mL (AAD – Amino-Acetonitrile Derivative class)

• Dosage:
  • 1 mL per 10 kg liveweight (oral drench)
  • Use standard drenching equipment; ensure accurate weight estimation.

• Administration:
  • Oral administration only
  • Suitable for lambs, hoggets and adult sheep
  • Integrates easily into routine drench programmes

• Pack Sizes:
  • 5 L
  • 20 L

• Withholding Periods:
  • Meat: 14 days
  • Milk: Do not use in lactating ewes producing milk for human consumption

• Export Slaughter Interval (ESI):
  • 21 days

• Storage:
  • Store below 30°C
  • Protect from light
  • Do not freeze

• APVMA Approval Number:
  • 69407

How does Flexolt work to control lice?

Flexolt contains monepantel, a systemic AAD-class molecule that targets the nematode-specific MPTL-1 receptor family. Once administered orally, the active ingredient circulates through the bloodstream, reaching lice as they feed. This creates whole-body coverage, delivering knockdown without relying on fleece penetration, jetting technique or external application. This mechanism makes Flexolt effective on both shorn and unshorn sheep.

When should Flexolt be used for best flock-wide lice control?

Flexolt is most effective when used as a whole-mob treatment, ensuring all sheep receive a dose on the same day to prevent reinfestation. It is particularly valuable where shearing timing is restricted or when treating unshorn lambs that cannot be backlined. Flexolt can be aligned with routine drenching events to minimise labour and maintain a closed lice cycle, supporting long-term eradication programmes.

Can Flexolt be used in conjunction with other drenches or flock treatments?

Yes. Flexolt can be incorporated into standard drench schedules, provided rotational parasite management principles are followed. It should not be mixed with other products in the same drench applicator but can be administered during the same handling session. Because it uses a unique resistance-breaking mode of action, Flexolt is particularly useful in flocks with declining efficacy to pyrethroids, neonicotinoids and insect growth regulators.