A patient calendar sheet which provides a space for the patient to check off every dose of medication he takes during an entire calendar month is described. Some advantages of the patient calendar sheet are: (1) It helps the patient understand what medications to take and when to take them, (2) the sheet can be used to help the pharmacist, physician or nurse explain to the patient how to take his medications, (3) the patient is less likely to miss a dose, (4) the patient can bring the sheet with him on clinic visits or on admission to the hospital so the physician can see what medications the patient has been taking and how well he has been adhering to the dosage schedule, and (5) an inpatient can mark off medications on his sheet as they are given by the nurse, thereby becoming accustomed to taking his medications properly.