Although medicine may seem to provide temporary relief from the ongoing physical or mental problem, to provide your relief, a medicine often needs to put extra strain on other organs of your body. For example, if you repeatedly take painkillers, it is difficult for the kidneys to process the ingredients of the painkiller. Similarly, if you repeatedly take cough medicines that make you feel dizzy, it taxes your nervous system. When you take medicine, an interaction happens between the ingredients of the medicine and your body. How your body reacts to such an interaction, depends on your physical health. Sometimes, if taken without supervision, medicines can have serious side effects.