Reckitt Benckiser Healthcare (uk) Limited

Rb Pharmaceuticals Limited

Christopher Bourne Chapleo

Neil Hyde

Keith McCormack

Nicolas Calvert Varey

John Lewis

John William Lewis

An analgesic composition, in parenteral unit dosage form or in a unit dosage form suitable for delivery via the dermis or mucosa, comprises buprenorphine and an amount of naltrexone such that the ratio by weight of buprenorphine to naltrexone delivered to or reaching the plasma of a patient is in the range 100:1 to 5000:1. The analgesic action of the buprenorphine is potentiated by the low dose of naltrexone. Also provided are a method of treatment of pain and the use of buprenorphine and naltrexone for the manufacture of a medicament.

Medicinal compositions comprising buprenorphine and naltrexone

An analgesic composition, in parenteral unit dosage form or in a unit dosage form suitable for delivery via the dermis or mucosa, comprises buprenorphine and an amount nalmefene such that the ratio by weight of buprenorphine to nalmefene delivered to or reaching the plasma of a patient is in the range 22.6:1 to 40:1. The analgesic action of the buprenorphine is potentiated by the low dose of nalmefene. Also provided are a method of treatment of pain and the use of nalmefene and buprenorphine for the manufacture of a medicament.

Medicinal compositions comprising buprenorphine and nalmefene

Ester derivatives of the phenolic hydroxyl group of buprenorphine can be used in the treatment of opiate dependency and/or moderate to severe pain. The esters have an enhanced bioavailability, an enhanced duration of action, and a reduced abuse potential.

Buprenorphine derivatives and uses thereof

An analgesic composition in parenteral unit dosage form or in a unit dosage form suitable for delivery via the mucosa comprising an amount of buprenorphine which is less than the clinical dose required to achieve pain relief and an amount of naloxone such that the ratio by weight of buprenorphine to naloxone is in the range of from 12.5:1 to 27.5:1, or an amount of naltrexone or nalmefene such that the ratio by weight of buprenorphine to naltrexone or nalmefene is in the range of from 12.5:1 to 22.5:1. The analgesic action of the buprenorphine is potentiated by the low dose of naloxone, naltrexone or nalmefene.

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Hull, United Kingdom

Christopher Bourne Chapleo