Mirabegron
"Horrible! I took one 25 mg pill 30 hours ago, and my heart has been racing ever since. I feel like I'm on crack and can't sleep at all. This is the most miserable feeling. I called the pharmacist, and she said that Myrbetriq has a 50-hour half life, which means that it's still another 20 hours before even half of the drug will be out of my system. On the flip side, I've had no overactive bladder whatsoever since I took it.

As soon as I recover from this fiasco, I'm going back to Oxytrol Patch."