A bit off topic but in commenting on the reference to Tramadol from Steve, I was put on it some years ago for serious back pain. Now having been diagnosed with Rheumatoid Arthritis and put on Methotrexate, they have decided to radically reduce the Tramadol. I now suffer from insomnia and have not had a nights sleep for about a month. GP simply says "Persevere" or one Doctor suggested going for a Jog. I don't walk without a stick but could go for a drive on my scooter.
I suffer from a directional hearing loss and also avoid crowded rooms as people think I am anti social. I am not.