Formulations and methods for delaying onset of chronic neuropathic pain
US9408846B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2013 |
| Grant date | Aug 9, 2016 |
| Priority date | — |
| Expiry date | Apr 23, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P43/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A dosing regimen for formulations that contain a therapeutic dosage of a site 1 sodium channel blocker, where the dosing regimen provides a prolonged nerve block and is in an effective amount to delay the onset of neuropathic pain, such as hyperalgesia and/or allodynia, for at least one week, and preferably longer at the site, and preferably the region (e.g. entire limb), where the nerve block was applied. The site 1 sodium channel blocker is preferably saxitoxin (STX), preferably in combination with a corticosteroid, preferably dexamethasone. In a preferred embodiment, liposomes are included in the formulation as a controlled release system, producing prolonged duration of block without systemic toxicity. As demonstrated by the examples, encapsulating STX in a controlled release system, such as liposomes, preferably also including a corticosteroid, and administering in suitable dosing regimen to achieve a prolonged nerve block without systemic toxicity, delays the onset of hyperalgesia.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.