Section 522.1289 - Lufenuron(a)Specifications. Each milliliter of suspension contains 100 milligrams (mg) of lufenuron.(b)Sponsor. See No. 058198 in § 510.600(c) of this chapter.(c)Conditions of use in cats - (1)Amount. 10 mg per kilogram (4.5 mg per pound) of body weight every 6 months, by subcutaneous injection.(2)Indications for use. For control of flea populations in cats 6 weeks of age and older.(3)Limitations. Federal law restricts this drug to use by or on the order of a licensed veterinarian.79 FR 16191, Mar. 25, 2014, as amended at 80 FR 61297, Oct. 13, 2015