I am a farmer, Suitably Qualified Person (SQP) or veterinary professional resident in the:
FAQ

What wormer classes have persistent activity?

Certain clear wormers (macrocyclic lactones) have licensed persistent activity in cattle and sheep, meaning they prevent reinfection with certain parasites for a defined period post treatment. Check the packaging to be sure. Chanelle Pharma products with this characteristic include Moxodex Oral (sheep), Animec Injection, Animec Pour On, Animec Super, Epromec, Topimec Super, Topimec Pour On and Zeromectin (cattle). Resistance to these products is growing in both cattle and sheep and so a vet or licensed merchant should be consulted before using them.

Certain clear wormers (macrocyclic lactones) have licenced persistent activity in cattle and sheep, meaning they prevent reinfection with certain parasites for a defined period post treatment. Check the packaging to be sure. Chanelle Pharma products with this characteristic include Moxodex Oral (sheep), Animec Injection, Animec Pour On, Animec Super and Epromec (cattle). Resistance to these products is growing in both cattle and sheep and so a vet or SQP should be consulted before using them.