Section 522.1704 - Pentosan polysulfate sodium(a)Specifications. Each milliliter of solution contains 250 milligrams (mg) of pentosan polysulfate sodium.(b)Sponsor. See No. 043264 in § 510.600(c) of this chapter.(c)Conditions of use - (1)Amount. Administer 3 mg per kilogram of body weight (1.4 mg per pound) by intramuscular injection once weekly for 4 weeks for a total of four doses.(2)Indications for use. For the control of clinical signs associated with osteoarthritis in horses.(3)Limitations. Federal law restricts this drug to use by or on the order of a licensed veterinarian. 88 FR 16548 , Mar. 20, 2023, as amended at 88 FR 84701 , Dec. 6, 2023 88 FR 16548 , 3/20/2023; as amended at 88 FR 84701 , 12/6/2023