Answer: It is never too old to correct anything, although our options and goals do change as we get older. Depression is a common response to chronic illness and may even be an intrinsic part of MS. I have written several blogs on this subject including one on self efficacy (Please read http://www.healthcarejourney.com/4/post/2014/01/self-efficacy-and-multiple-sclerosis.html)
It is not uncommon for people with MS to receive a diagnosis of depression followed by a prescription for an anti depressant; but the cure can not stop at this point. You must take an active role in your healthcare; effective management of depression requires an exercise program, increased socialization, cognitive behavioral therapy and most importantly a sense that you have some control over your path. Talk about this with your doctor and see if he or she can help you find resources to help with your journey.