Most drugs take on the responsibility to affect processes in certain parts of the body that may be functioning abnormally. In many cases, the intended result of the medications working inside someone also affects other parts of them, thus eliciting side effects for the person. All drugs contain chemical compounds, and too much of these can destroy cells, which leads to an undesirable impact on our cells, which leads to side effects as a result of tissue damage in specific areas of the body.
For example, NSAIDs such as aspirin work well for preventing blood clots. However, the same enzymes that are present in the stomach lining cannot be recognized apart from each other. Therefore, aspirin may harm the stomach, and it might cause problems if left unchecked.