Monthly pill organizers can be a literal life saver, preventing missed doses and over doses. With monthly pill planners, you can pre-fill a month in advance, freeing you from the burden of doing it daily or weekly. Having two monthly pill organizers can help those using mail order prescription services. Often the prescriptions only come once a month, or at different times from different sources. If you have two monthly pill organizers, it gives you a month to fill up the empty one while still using the current pill organizer.