StacksVerified U.S. regulatory reference

21 CFR §524.463

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Amount. The drug is a 37.5 percent solution of copper naphthenate.
  2. (b)Sponsors. See Nos. 017135, 054771, and 058829 in § 510.600(c) of this chapter.
  3. (c)Conditions of use in horses—(1) Amount. Apply daily to affected hooves until fully healed.
    1. (2)Indications for use. As an aid in treating horses and ponies for thrush caused by organisms susceptible to copper naphthenate.
    2. (3)Limitations. Use on horses and ponies only. Avoid contact around eyes. Do not contaminate feed. Do not use in horses intended for human consumption.