Fig 1
This is a chart that displays the concentration of Tramadol, a type of pain medication, over a period of time. The chart shows the concentration in nanograms per milliliter (ng/mL) on the left axis and time in hours on the bottom axis. There are two lines on the chart, one for Tramadol Hydrochloride Extended-Release Tablets at a dose of 200mg once daily, and another for Tramadol Hydrochloride Tablets at a dose of 50mg every 6 hours.*