What is the term used to describe symptoms or effects resulting from the excessive dose of a drug?

The term that describes symptoms or effects resulting from an excessive dose of a drug is known as a toxic effect. This occurs when the concentration of the drug in the body exceeds the therapeutic range, leading to harmful or potentially life-threatening consequences. Toxic effects can manifest in various ways, such as organ damage, severe allergic reactions, or even overdose symptoms that necessitate medical intervention.

While adverse reactions can also result from a drug, they are not exclusively due to excessive dosing and may occur even at therapeutic levels. Side effects are typically understood as unwanted but generally mild effects that do not usually result from overdosing. Drug interaction refers to the effects that occur when two or more drugs are taken simultaneously but does not specifically address the consequences of an excessive dose of one drug alone.