Section 520.531 - Cythioate tablets(a)Specifications. Each tablet contains 30 or 90 milligrams (mg) cythioate.(b)Sponsors. See sponsor numbers in § 510.600(c) of this chapter as follows: (1) No. 058198 for use of 30- and 90-mg tablets.(2) No. 054771 for use of the 30-mg tablet.(c)Conditions of use - (1)Amount. 30 milligrams cythioate per 20 pounds of body weight every third day or twice a week.(2)Indications for use. Dogs, for control of fleas.(3)Limitations. Federal law restricts this drug to use by or on the order of a licensed veterinarian.49 FR 5615, Feb. 14, 1984, as amended at 59 FR 26942, May 25, 1994; 67 FR 78355 , Dec. 24, 2002; 79 FR 28819 , May 20, 2014; 86 FR 14818 , Mar. 19, 2021