1. Brachial plexus block with bupivacaine: effects of added alpha-adrenergic agonists: comparison between clonidine and epinephrine.;Eledjam;Can J Anaesth,1991
2. Adding clonidine to mepivacaine prolongs the duration of anesthesia and analgesia after axillary brachial plexus block.;Singelyn;Reg Anesth,1992
3. The metabolism of tramadol by human liver microsomes.;Paar;Clin Invest,1992
4. Opioid and nonopioid components independently contribute to the mechanism of action of tramadol, an atypical opioid analgesic.;Raffa;J Pharmacol Exp Ther,1992
5. Receptor binding, analgesic and antitussive potency of tramadol and other selected opioids.;Hennies;Arzneimittel Forschung Drug Res,1988