Evaluation of Effectiveness and Tolerability of Tapentadol Hydrochloride in Subjects With Severe Chronic Low Back Pain Taking Either WHO Step I or Step II Analgesics or no Regular Analgesics
CompletedNCT00983385
Grünenthal GmbHChronic Pain, Low Back Pain
Start: 2009-09-30End: 2010-07-06Updated: 2019-01-15