In general, we recommend using the Tasks List feature (How do I complete treatments from Tasks?) which is meant to be a live to-do list where you can efficiently clear tasks out on your computer/tablet as they are completed. This allows for all animal records have the most up-to-date medical data as possible and hopefully be more time saving than printing the lists out, marking them as complete on paper, then going back into the software later to enter this data.
There is currently no system generated document for an individual animal's treatments due but if you like, you can select and print a set of treatments from the animal's treatments tab directly.
You can also print treatments that are due over a given time range via the Treatments Task List, from the Location View specifically: