Not all pain medications are alike and each person is slightly different in the way they respond to a pain medication. Specific types and causes of pain may respond better to one kind of pain medication than to another kind.
Review Date 10/12/2018
Updated by: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.