First analyse and isolate the root cause of the stress. Stree may be caused by economic, social or psychological circumstanses. If the cause of the stress is not easy to remove you have to learn to bear it and thus reduce its effect on you, your thinking, your behaviour. Relaxing the Yoga way is an ideal way to start. Do not take any medicine; that will only make you drowsy, will be like burying the head in the sand to avoid the cause of the stress.