1. Pharmacology of oral combination analgesics: Rational therapy for pain;Raffa;J Clin Pharmacol Ther,2001
2. Evaluation of oxycodone and acetaminophen in treatment of postoperative dental pain;Cooper;Oral Surg Oral Med Oral Pathol,1980
3. The basic science aspect of tramadol hydrochloride;Raffa;Pain Rev,1996
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. Tramadol hydrochloride: Short term efficacy in pain following dental surgery;Mehlisch;Clin Pharmacol Ther,1993