Drench groups and actives


Drench groups and actives Worms Examples* of brand names/comments

BZ or benzimidazole group (‘white’)B

albendazole
fenbendazole
oxfendazole

barber’s pole worm, ‘scour worms’, adult liver fluke, nodule worm, aids control of intestinal tapeworm (Moniezia)

Valbazen (albendazole)
WSD Fenbendazole (fenbendazole)
Oxfen (oxfendazole)

LV or levamisole group (‘clear’)B

       levamisole    

barber’s pole worm, ‘scour worms’, nodule worm

Nilverm, Levamisole Gold

ML or macrocyclic lactone groupB (sometimes called ‘mectins’)

       Ivermectin
       abamectin
       moxidectin

barber’s pole worm, ‘scour worms’, nodule worm

Ivomec, Noromectin (ivermectin)
Absolute, Vetmec, Paramectin (abamectin)
Cydectin, Moxitak (moxidectin)

 

AD or amino-acetonitrile derivative groupB

       monepantel

barber’s pole worm, ‘scour worms’ Zolvix

SI or spiroindole groupM

       derquantel

barber’s pole worm, ‘scour worms’,  nodule worm

Derquantel is only found in a combination: Startect (abamectin + derquantel)

OP or organophosphate groupM

naphthalophos (NAP)

(OPs have lower or variable efficacy against ‘scour worms’ in the upper GIT and immature barber’s pole worm)

barber’s pole worm, 'scour worms’

Combat, Rametin, (naphthalophos is commonly used in combinations)

TZ or benzimidazole group (flukicide)N

       triclabendazole

Liver fluke (all stages); not effective against round worms Fasinex, Tremacide, Exifluke

SA or salicylanilides/phenols groupN

closantel

Liver fluke (> 9 weeks and adult) and barber’s pole worm

Closicare, Sustain

IQ or isoquinolone groupN

       praziquantel

Intestinal tapeworm (Moniezia) PraziquantelN is only available in combination with broad-spectrum drenches.  First DrenchB, Genesis TapeB

 


*ParaBoss does not endorse specific brands, these are presented here as examples only.

Breadth of activity across different worm species: BBroad-spectrum; MMid-spectrum; NNarrow-spectrum

Actives: An ‘active’ is the chemical in a drench responsible for killing worms. Some drenches have more than one active and are called ‘multi-active’ or ‘combination’ drenches.

Combination or multi-active treatments: Proprietary treatments containing more than one active. Formulated to be compatible as a mixture. Note: Do not mix your own drenches unless the labels state that you can.

Product formulation: All single actives are available as oral drenches. Moxidectin is also available in injectable products. Intra-ruminal/controlled release capsules are available with BZ and/or ML actives. Abamectin is also in a pour-on formulation for both lice and worm control.

Length of protection: Varies from short-acting (‘knock-down’ that kills susceptible worms within the animal) to mid-length (1–6 weeks) and long-acting (approx. 3 months), which not only kill susceptible worms already in the animals, but also infective larvae that the sheep eat during the protection period.

‘Scour worms’: Mainly black scour worm and (small) brown stomach worm, but also others.

Label: Check product labels for full details. Follow the label.

Other parasites: ‘Drenches’ shows effectiveness of groups against other parasites of minor importance.