Orally administered analgesic compositions containing nalbuphine

摘要

The present invention provides orally administered pharmaceutical compositions which contains an effective amount of free base or pharmaceutically acceptable salts of nalbuphine and/or nalbuphine ester, an oily substance, and a solubility-assisting agent. The oily substance is preferably sesame oil. The solubility-assisting agent is preferably benzyl benzoate. The pharmaceutical composition is useful as an analgesic. The compositions achieves a much higher bioavailability rate and yields much longer lasting effects on nalbuphine than other nalbuphine products currently in the market.