To me this means most if not all drugs are capable of misuse which can lead to harmful outcomes, toxicities, and even fatalities, including those that are viewed by the general public as relatively routine and harmless. For example, Tylenol (acetaminophen) and Motrin (ibuprofen) are a widely known and widely used nonopioid pain relieving agents used to fevers and mild pains like headaches. However, ingesting more than 3200 mg per day of ibuprofen or 3000-4000 mg per day of acetaminophen can lead to life-threatening conditions such as toxic epidermal necrolysis, hepatotoxicity, gastrointestinal bleeding, heart failure, heart attack, stroke, and Stevens-Johnson syndrome.
Pharmacology is not something to take lightly. Read the directions of the medications, ask your healthcare workers questions even if they may be embarrassing, and ensure you know what you are taking, why you are taking, how much of it you are taking, and what side effects and adverse effects are possible!