I have taken this drug for 4 nights, as prescribed. It is for GERD caused by RA medications and stress. It seemed to help for two nights, then I started feeling worse, back to the same feelings I had previously. I have difficulty being able to take a "deep" breath and I had terrible nightmares last night. I woke up and was feeling extremely depressed all day and had no energy at all. I think I will have to stop taking this before I get even worse.