What are the opposite words for over dose?

Antonyms for the word "overdose" include "underdose" and "subtherapeutic dose." An underdose occurs when the amount of medication administered is less than the prescribed dose, while a subtherapeutic dose refers to a dose that is below the minimum therapeutic level required to treat a condition. Other antonyms for overdose could be "normal dose" or "therapeutic dose," which refer to the prescribed amount of medication necessary to appropriately treat a medical condition. It is important to follow the prescribed dose to avoid any negative side effects that can be a result of overdosing, such as toxicity or life-threatening complications.