What term describes substances used for diagnosis, cure, mitigation, treatment, or prevention of disease?

• A. Drugs
• B. Medicines
• C. Remedies
• D. Therapies

Answer: (A)

Think of a drug as any chemical or natural substance that is used to produce a therapeutic effect in the body. The description given—substances used for diagnosing, curing, mitigating, treating, or preventing disease—fits this term because drugs are the agents that modify physiological functions to achieve health outcomes. Medicines are related and often used interchangeably in everyday language, but in pharmacology, the explicit label for these active substances is typically drugs. Remedies and therapies describe the treatment concepts rather than the substances themselves: remedies can be informal or non-specific cures, and therapies refer to the methods or modalities of treatment (like chemotherapy or physical therapy). Therefore, the best fit for the described role is drugs.