Thanks for your questions.
You have been suffering from major depressive disorder
for last 10 years so you have to continue the antidepressant medication lifelong.the doses and type of drugs may be chande depending on your response.
One of the side effect of those medication is constipation
and for that you have to take plenty of water and vegetables and if not relieved you may have to take isobgul husk at night.
But please dont stop or change the medication without consent from a psychiatrist
and if you feel any problem you will please consult him and i am sure he will help you out.