Description_x000D_ Biochem/physiol Actions_x000D_ σ receptor agonist; active enantiomer of pentazocine._x000D_ Features and Benefits_x000D_ This compound was developed by Sanofi Aventis. To browse the list of other pharma-developed compounds, Approved Drugs, and Drug Candidates, click here._x000D_ Caution_x000D_ Photosensitive_x000D_ Reconstitution_x000D_ A 10 mM solution of (+)-pentazocine is prepared by warming 28.5 mg of (+)-pentazocine free base in 2 mL of 0.1N HCl with shaking or sonication. When all solids have dissolved, the solution is cooled to room temperature and diluted with 10 mL of pH 7 buffer. Solutions should be freshly prepared, since cooling below room temperature may result in precipitation.