# Verdinexor

Source: https://onco.cc/drugs/verdinexor/  
OnCo record `verdinexor` (Treatment). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

Verdinexor (Laverdia) is a tablet for dogs with lymphoma, the first oral lymphoma treatment for dogs to gain full approval from the US Food and Drug Administration. It works the same way as the human myeloma drug selinexor.

## Summary

Laverdia (verdinexor tablets) was conditionally approved by the FDA Center for Veterinary Medicine in January 2021 through the Minor Use/Minor Species pathway and, after four annual renewals, received full approval under NADA 141-614 (Freedom of Information Summary dated 18 December 2025; FDA update of 16 January 2026), sponsored by Anivive Lifesciences, Inc., of Long Beach, California, for the treatment of lymphoma in dogs. The starting dose is 1.25 mg/kg by mouth twice a week, at least 72 hours apart, given with food.

In the field study of dogs with naive or relapsed B-cell or T-cell lymphoma (106 treated, 28 controls), median time to progression was 37 days (95% CI 29 to 57) with verdinexor against 23 days (14 to 30) in controls (P = 0.011). Verdinexor was studied as KPT-335 and blocks the same exporter, XPO1, as the human drug selinexor. It is a veterinary medicine and has no human approval.

## Fields

- Kind: Treatment
- Last checked: 2026-11-04
- Also known as: Laverdia; KPT-335; verdinexor tablets
- Tags: veterinary; comparative-oncology
- Brand: Laverdia
- Code: KPT-335
- Modality: small molecule (selective inhibitor of nuclear export)
- Mechanism: A selective inhibitor of nuclear export that blocks chromosome region maintenance 1 (exportin 1, XPO1), keeping tumour suppressor and growth regulatory proteins in the nucleus where they control cell growth; the same mechanism as the human drug selinexor.

## Sources

- FDA Consumer Update: My Dog Has Cancer: What Do I Need to Know?: https://www.fda.gov/consumers/consumer-updates/my-dog-has-cancer-what-do-i-need-know
- FDA Freedom of Information Summary, NADA 141-614 Laverdia (dated 18 December 2025): https://animaldrugsatfda.fda.gov/adafda/app/search/public/document/downloadFoi/17795
- FDA CVM update, 16 January 2026: full approval of the first oral treatment for lymphoma in dogs: https://www.fda.gov/animal-veterinary/cvm-updates/fda-grants-full-approval-first-oral-treatment-lymphoma-dogs
- Sadowski et al. 2018, BMC Vet Res: phase II study of KPT-335 (verdinexor) in dogs with lymphoma: https://doi.org/10.1186/s12917-018-1587-9

## Connected records

- ideas: [Pet dogs with spontaneous cancer as a bridge before human trials](https://onco.cc/ideas/idea-bio1-comparative-oncology-dogs/)
- journals: [Veterinary and comparative oncology](https://onco.cc/journals/veterinary-and-comparative-oncology/)
- drugs: [Selinexor](https://onco.cc/drugs/selinexor/)
- targets: [Exportin-1 (XPO1)](https://onco.cc/targets/xpo1/)

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