Medicine (noun)

1. Substances or preparations used in the treatment of disease or illness.
2. The art or science of diagnosing, treating, and preventing illness and disease.

Origin:

Middle english: from old french medecine, from latin medicina "healing, medicine", from medicus "physician".

Examples:

1. He took his medicine.
2. She prescribed the medicine.
3. They studied medicine.
4. The medicine was effective.
5. The medicine had side effects.