21 CFR § 520.2700 - Verdinexor tablets.

---
identifier: "/us/cfr/t21/s520.2700"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 520.2700 - Verdinexor tablets."
title_number: 21
title_name: "Food and Drugs"
section_number: "520.2700"
section_name: "Verdinexor tablets."
chapter_name: "FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "E"
subchapter_name: "ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS"
part_number: "520"
part_name: "ORAL DOSAGE FORM NEW ANIMAL DRUGS"
positive_law: false
currency: "2026-04-16"
last_updated: "2026-04-16"
format_version: "1.1.0"
generator: "[email protected]"
authority: "21 U.S.C. 360b."
regulatory_source: "40 FR 13838, Mar. 27, 1975, unless otherwise noted."
cfr_part: "520"
---


# 520.2700 Verdinexor tablets.

(a) *Specifications.* Each tablet contains 2.5, 10, 22.5, or 50 milligrams (mg) verdinexor.

(b) *Sponsor.* See No. 086121 in § 510.600(c) of this chapter.

(c) *Conditions of use*—(1) *Amount.* Administer verdinexor tablets orally at an initial dose of 1.25 mg per kilogram (mg/kg) of body weight twice per week with at least 72 hours between doses. If tolerated after 2 weeks, increase the dose to 1.5 mg/kg twice per week with at least 72 hours between doses.

(2) *Indications for use.* For the treatment of lymphoma in dogs.

(3) *Limitations.* Federal law restricts this drug to use by or on the order of a licensed veterinarian. It is a violation of Federal law to use this product other than as directed in the labeling.

[91 FR 20342, Apr. 16, 2026]