Reckitt & Colman Products Limited

John W Lewis

John G Lloyd-Jones

Ian G Guest

Gordon W Kirby

Ryszard J Kobylecki

Colin F Smith

A pharmaceutical composition in sublingual unit dosage form for maintenance treatment of opiate addicts comprising from 2 to 8 mg buprenorphine and an amount of naltrexone sufficient to substantially attenuate the euphorigenic effect of the buprenorphine when injected and to provide greater opiate blocking effect than that of naltrexone alone.

Treating opiate dependence

A compound of the formula: ##STR1## A process for its preparation and pharmaceutical compositions comprising the compound or a pharmaceutically acceptable salt thereof with a pharmaceutically acceptable diluent or carrier. The compound exhibits analgesic activity.

Derivative of codeine useful as an agonist and process for the

An analgesic composition in parenteral or sublingual unit dosage form comprising an active dose of buprenorphine and an amount of naltrexone sufficient to prove aversive to a narcotic addict by parenteral administration but insufficient to compromise the analgesic action of the buprenorphine.

Analgesic compositions

A method of treating pain which comprises the administration to a patient of a parenterally or sublingually effective dose of buprenorphine together with an amount of naloxone sufficient to prevent substitution in an opiate dependent subject. Preferably when the administration is parenteral the weights of naloxone and buprenorphine are within the ratio of 1:3 to 1:1 and when administered sublingually the weights are within the ratio of 1:2 to 2:1.

Novel derivatives of morphine having the general formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are certain specified values, and their pharmaceutically acceptable salts. The compounds exhibit activity in the central nervous system and may be presented in the form of pharmaceutical compositions comprising a compound of formula (I), or a pharmaceutically acceptable salt thereof, in association with a pharmaceutically acceptable diluent or carrier.

14-Amino derivatives of morphine, methods of making them and analgesic

Novel derivatives of morphine having the general formula: ##STR1## wherein R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are certain specified values, and their pharmaceutically acceptable salts. The compounds exhibit activity in the central nervous system and may be presented in the form of pharmaceutical compositions comprising a compound of formula (I), or a pharmaceutically acceptable salt thereof, in association with a pharmaceutically acceptable diluent or carrier.

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North Ferriby, United Kingdom

John W Lewis