Description
Startect Oral Drench For Sheep – 5L
Startect Oral Drench For Sheep is a broad-spectrum, short-acting oral drench that effectively targets internal parasites, including worms resistant to older actives. Its unique combination of derquantel (10 mg/mL) and abamectin (1 mg/mL) makes it a vital option for modern resistance management, especially when rotating drenches to reduce long-term resistance risk.
Why choose Startect?
Startect contains derquantel a new active from the spiroindole (SI) class with no known resistance combined with abamectin to deliver dual-action parasite control. The deliberate pairing of these actives helps protect both ingredients from resistance and supports the sustainability of your drench program.
What does Startect treat?
Startect controls a wide range of adult and immature (L4) parasites, including strains resistant to levamisole (LEV), benzimidazoles (BZ), macrocyclic lactones (ML), and closantel (CLOS):
- Barber’s pole worm (Haemonchus contortus)
- Small brown stomach worm (Teladorsagia circumcincta)
- Black scour worm (Trichostrongylus spp.)
- Stomach hairworm (Trichostrongylus axei)
- Small intestinal worm (Cooperia spp.)
- Intestinal threadworm (Strongyloides papillosus)
- Lungworm (Dictyocaulus filaria)
- Thin-necked intestinal worm (Nematodirus spathiger) – adult
- Large bowel worm (Oesophagostomum venulosum) – adult
- Large mouthed bowel worm (Chabertia ovina) – adult
- Whipworm (Trichuris ovis) – adult
Additional control
- Nasal bot (Oestrus ovis)
- Itch mite (Psorergates ovis)
Active Ingredients
Derquantel @ 10mg/ml
Abamectin @ 1mg/ml
Dose rate and administration
- 1 mL per 5 kg bodyweight, administered orally
- Shake well before use
- Use a drench gun with silicone-sealed O-rings
- Startect oral applicator (20mL) sold separately
Dose guide
| Weight (kg) | Dose (mL) | 5L Treats | 15L Treats |
|---|---|---|---|
| 15 | 3 | 1,666 | 5,000 |
| 16–20 | 4 | 1,250 | 3,750 |
| 21–25 | 5 | 1,000 | 3,000 |
| 26–30 | 6 | 833 | 2,500 |
| 31–35 | 7 | 714 | 2,142 |
| 36–40 | 8 | 625 | 1,875 |
| 41–45 | 9 | 555 | 1,666 |
| 46–50 | 10 | 500 | 1,500 |
| 51–55 | 11 | 454 | 1,363 |
| 56–60 | 12 | 416 | 1,250 |
| 61–65 | 13 | 384 | 1,153 |
| 66–70 | 14 | 357 | 1,071 |
| 71–75 | 15 | 333 | 1,000 |
Usage tips
- Dose the mob to the heaviest animal in each group
- Weigh a sample of animals before treatment
- Consider drafting by weight where variation is high
- Do not underdose—follow label instructions carefully
- ESI (Export Slaughter Interval): 28 days
Choosing the right drench
Not sure if Startect is right for your program? See our article on choosing the right livestock drench to better understand rotation strategies and when to use short-acting drenches like this one.
Technical Information
These documents provide verified product information for safety, handling and regulatory compliance.
- Safety Data Sheet (SDS): Startect_Broad_Spectrum_Oral_Drench_for_Sheep_SDS
- Product Label: STARTECT_BROAD_SPECTRUM_ORAL_DRENCH_FOR_SHEEP_LABEL
- Product TechSheet: Startect_Oral_Drench_For_Sheep_TechSheet
- APVMA Product Registration Number: 64247
Backed by Zoetis
Manufactured by Zoetis, a global leader in livestock health and innovation, trusted by Australian producers nationwide.







Nate Kellock –
Fantastic drench that has a new class of active with results of over 95% effectiveness.