Blistercard1
This appears to be a part of a medication schedule or chart that is meant to be used for two different start days, Sunday or "day-1". The chart is labeled with days of the week and a numbered week system. There are also directions given to take pills in a specific direction from left to right each week. However, without further context or visible information, it is not possible to determine what kind of medication or treatment this chart is meant to be used for.*