Is drug good for health

Using medicines can make you sick.There are many good factors about using medicines e.g. if you are suffering with fever then you take medicine and you will be revealed from fever.But medicines also have some disadvantages like medicines can harm your stomach and also many other side effects, i am using medicines for almost five years because i am patient of ankylosing spondylitis, using medicine for long is not good thing, because sometimes you can go in depression.I am sick of using medicines and want to leave but cant.