The reason that drugs have side effects is due to the chemical makeup of the drug. These chemicals can have an impact on the hormones and composition of the body. Drugs are a disturbance to the body, which can cause a number of different side effects, including rashes, hard time breathing, or pain.
This is why all commercials related to drugs recommend speaking with a doctor before starting a drug, because depending on the health of the person, their body may not be able to handle the side effects that come with the drug. Along with that, sometimes, the side effects can be worst than what is to be treated.
Most of the drugs out there on the market today possess an obscene amount of side effects, especially if misused. For example, cough syrup may make you tired, or the antidepressant you take affects your hormones, and it seems like there are no right answers in the world of medicine.
This outcome is because the medicine will often not only have the desired effect on the body; it will also affect other parts of the body that do not need to be changed. It also means that the medicine may alter numerous processes within the body, and you will have to consider the problems and benefits deciding between the lesser of two evils.