Figure 1From: Pharmacokinetics of tramadol after subcutaneous administration in a critically ill population and in a healthy cohort Individual plasma tramadol concentrations in the healthy subjects and patients. All patients and healthy subjects received a 50Â mg subcutaneous bolus dose of tramadol. The median for each subject group is shown by the solid line. Graphs are truncated at 1200Â minutes and 1440Â minutes respectively, as plasma concentrations were less than the lower limit of quantification of the assay.Back to article page