Code of Federal Regulations Title 21. Food and Drugs § 21.520.763b Dithiazanine powder

(i) For large roundworms (Toxocara canis, Toxascaris leonina):  10 mg per pound (/lb) of body weight for 3 to 5 days;

(ii) For hookworms (Ancylostoma caninum, Uncinaria stenocephala) and whipworms (Trichuris vulpis):  10 mg/lb of body weight for 7 days;

(iii) For Strongyloides (Strongyloides canis, Strongyloides stercoralis):  10 mg/lb of body weight for 10 to 12 days;

(iv) For heartworm microfilariae (Dirofilaria immitus):  3 to 5 mg/lb of body weight for 7 to 10 days. Treatment for heartworm microfilariae should follow 6 weeks after therapy for adult worms.