StacksVerified U.S. regulatory reference

21 CFR §522.224

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov
(a) Specifications. Each milliliter (mL) of liposomal suspension contains 13.3 milligrams (mg) bupivacaine.
(b) Sponsor. See No. 058198 in § 510.600(c) of this chapter.
(c) Conditions of use—(1) Dogs—(i) Amount. Administer 5.3 mg/kg (0.4 mL/kg) by infiltration injection into the tissue layers at the time of incisional closure. (ii) Indications for use. For single-dose infiltration into the surgical site to provide local postoperative analgesia for cranial cruciate ligament surgery. (2) Cats—(i) Amount. Administer 5.3 mg/kg per forelimb (0.4 mL/kg per forelimb), for a total dose of 10.6 mg/kg/cat, as a 4-point nerve block prior to onychectomy. (ii) Indications for use. For use as a peripheral nerve block to provide regional postoperative analgesia following onychectomy.