Albendazole is a white liquid available in drench form. All of these wormers have unique characteristics in regards to dosing rate, withdrawal dates prior to slaughter, what parasites they are effective against, possible side effects, and of course, cost. One needs to visit with their veterinarian and carefully read labels before using these products. There are other anthelmintics available to use in sheep, but they are not FDA approved. However, all three of these dewormers can be used to base a treatment program on.
Parasites can develop resistance to anthelmintics.
Thus, they should be used judiciously. The current recommendations are to use one type of dewormer for one year and then switch to another type the next year and still another type the third year. The process would start anew in the fourth year. Those producers that do wish to control tapeworms will have to give an annual dose or two of Albendazole during tapeworm season. Fecal exams by an experienced veterinarian can be of assistance in determining when to deworm or if parasite resistance to antheimintics is a problem.