Which term is used for anything that will counteract or remove the effects of poison or disease?

The term "antidote" specifically refers to a substance that can counteract or neutralize the effects of a poison or disease. Antidotes work by various mechanisms, such as binding to the toxic substance, blocking its effects, or restoring normal physiological function. For example, naloxone is an antidote used to reverse opioid overdoses, indicating the critical role antidotes play in medical emergencies and treatment.

The other terms do not relate to the concept of neutralizing toxins or diseases. "Arid" describes a dry climate, which has no connection to poisoning. "Apt" refers to being appropriate or suitable in a particular situation, and "apparition" pertains to a ghostly presence or appearance, neither of which has any relevance to the medical context of poisons or antidotes. Understanding these distinctions reinforces the unique importance of the term "antidote" in toxicology and medicine.