Following diagram shows pie charts and bar charts for the advantages and disadvantages of different medications. As illustrated below, long-term, high-dose opioids can lead to potential harm. Naloxone is a safe and effective medication. Lastly, the person seems confident in their abilities to prescribe naloxone. Both the pie chart and bar charts show a similar thing, but they are both different and important. In addition, pie charts show how much each category represents as a proportion of the whole by using a circular format with different-sized "slices" for different percentages of the whole. Bar graphs use a series of rectangular bars to show absolute values or proportions for each category.