adhd
"I was diagnosed with ADHD very late in life, at 55. My main symptoms are depression, anxiety, insomnia, lack of motivation/energy and a raft of others. I have tried every anti-depressant available, most of which didn't work or the side effects were too bad. 
I always seem to have to take high doses of medication, and ended up on 120mg of Strattera. It didn't do much for my concentration or cognitive symptoms, but after a few months I noticed my motivation getting better. However, it caused my quite severe cardiac symptoms and the dose was dropped to 100mg. I needed to think straight, so Methylphenidate was added. This was a great combination for me, apart from the side effects which often go away given time, but in my case didn't."