a Dithiazanine tablets.
21 C.F.R. § 520.763a
in effectEffective: 2024-07-01(a) Specifications. Each tablet contains 10, 50, 100, or 200 milligrams (mg) dithiazanine iodide.
(b) Sponsor. See No. 069043 in § 510.600(c) of this chapter.
(c) Conditions of use in dogs—(1) Indications for use and amount. Administer orally immediately after feeding as follows:
(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.
(2) Limitations. Federal law restricts this drug to use by or on the order of a licensed veterinarian.
Source: eCFRURL: https://www.ecfr.gov/api/versioner/v1/full/2024-07-01/title-21.xmlFetched: 7/26/2026
