"i had a car accident two and a half years ago.  it damaged my shoulder and gave me severe back pain.  last year i eventually had an operation to resolve the problem of a chipped bone and a release but it did not help me with the constant stabbing pain which i was told was my nerve and tendons being in a knot.  after numerous attempts through physiotherapy, massages, pain killers and injections, none of them worked until i was prescribed nortriptyline.  what a difference, i am hardly in any pain now and feel much better."