Tanzeum pen I suppose is more convenient than recently approved Bydureon pen. Bydureon pen from diaTribe:
The new pen preparation process does have a few hassles in this first generation and we look for more improvement over time. The pen will have to be refrigerated for storage and then must rest at room temperature for at least 15 minutes before use. The patient will then twist the base of the pen to mix the drug and tap the pen firmly against the palm of their hand – the guide states that people may need to tap the pen “80 times or more” while rotating the pen until the solution is completely mixed. While this new process is a significant improvement from manual mixing, AstraZeneca is also working on a Bydureon suspension formula and auto-injector that will certainly increase convenience further.