anxiety
"I take this medication as needed. I take 150 mg Effexor daily, which helps with the majority of my depression and anxiety, but I take Xanax when I need to take the edge off. I was recently prescribed this, and I have only had to use it twice, while flying (I go into full panic mode). I took an entire pill 30 minutes before my flight and it made me relax right away. I have never been able to sleep on a plane (even during international flights), but it calmed me down to the point I fell asleep during both flights. It didn't even bother me during take off when the pilot had to slam on the breaks due to a cargo light.

This medication does make me sleepy, though I have not taken half a dose so far. My panic attacks are not as frequent as some."