#morphine

• Alkaloid — A nitrogenous organic substance, typically possessing a basic (alkaline) character and a complex heterocyclic structure, primarily biosynthesized by plants, but also by certain fungi or animals. Alkaloids exhibit intense pharmacodynamic action on the central nervous system and the human body, functioning, depending on the dosage, as essential medicines, stimulants, or highly violent poisons (for example: morphine, caffeine, nicotine, atropine, quinine).
• Apomorphine — A medicinal substance chemically derived from morphine via dehydration, yet devoid of analgesic or narcotic properties, acting as a potent and non-selective dopamine receptor agonist; a fast-acting emetic. In contemporary medical practice, it is utilized as an injection or infusion for treating acute immobility episodes ('off' periods) in advanced Parkinson's disease patients.