1. Emetic effects of morphine and piritramide†
C. Breitfeld, J. Peters, T. Vockel, C. Lorenz, M. Eikermann 
British Journal of Anaesthesia 
Volume 91, Issue 2, Pages (August 2003)
DOI: /bja/aeg165
Copyright © 2003 British Journal of Anaesthesia Terms and Conditions

2. Fig 1
Incidence of side-effects of all patients using patient-controlled anaesthesia (n=458) on postoperative day 1 (exact numbers are given above the bars). There was no difference in the incidence of side-effects with morphine compared with piritramide.
British Journal of Anaesthesia  , DOI: ( /bja/aeg165)
Copyright © 2003 British Journal of Anaesthesia Terms and Conditions

3. Fig 2
Pain scores (numerical rating scale (NRS); mean (sd)) on the postoperative days 1–4 (a) during movement and (b) at rest. On postoperative day 1, pain scores both during movement (4.9 (2.3) vs 4.5 (2.2)) and at rest (2.6 (2) vs 2.2 (1.9)) were lower in the morphine group. *P<0.05 vs piritramide.
British Journal of Anaesthesia  , DOI: ( /bja/aeg165)
Copyright © 2003 British Journal of Anaesthesia Terms and Conditions

4. Fig 3
Piritramide concentration during storage at room temperature and at 2–8°C). With storage at 2–8°C, a slight (<5%, P<0.05) increase in piritramide concentration occurred over 40 days. Storage at room temperature was associated with a 14% increase in piritramide concentration.
British Journal of Anaesthesia  , DOI: ( /bja/aeg165)
Copyright © 2003 British Journal of Anaesthesia Terms and Conditions