How do you calculate par level in pharmacy?

To calculate the par level in a pharmacy, you need to assess the average usage of each medication over a specific time period, typically based on historical data. Then, consider the lead time for restocking and any safety stock needed to account for variability in usage or delivery delays. The formula generally used is: Par Level = (Average Daily Usage × Lead Time) + Safety Stock. This helps ensure that you have enough inventory on hand to meet patient needs without overstocking.