1. A Comparison of the Pharmacokinetics, Clinical Efficacy, and Tolerability of Once-Daily Tramadol Tablets with Normal Release Tramadol Capsules 
Bhavesh Bodalia, MB ChB, DRCOG, Chris J McDonald, MB BS, MRCOphth, FFPM, Kevin J Smith, BSc (Hons), PhD, Catherine O'Brien, BSc (Hons), Lois Cousens, BSc (Hons) 
Journal of Pain and Symptom Management 
Volume 25, Issue 2, Pages (February 2003)
DOI: /S (02)

2. Fig. 1
Plasma tramadol and O-desmethyltramadol profiles at steady-state for volunteers receiving OD tablet 150 mg (triangle), OD tablet 200 mg (square), or NR capsule 50 mg (bar).
Journal of Pain and Symptom Management  , DOI: ( /S (02) )

3. Fig. 2
Disposition of patients enrolled in the clinical study. A = OD tablet 150 mg, B = OD tablet 200 mg, and C = NR capsule 50 mg.
Journal of Pain and Symptom Management  , DOI: ( /S (02) )

4. Fig. 3
Adjusted mean treatment differences in VAS pain scores (95% confidence intervals). A = OD tablet 150 mg, B = OD tablet 200 mg, and C = NR capsule 50 mg.
Journal of Pain and Symptom Management  , DOI: ( /S (02) )