- Quercetin
- A flavonoid that is widely distributed in the plant kingdom.
Flavonoids are naturally occurring antioxidants found in many fruits, vegetables, and other plants. Quercetin has antihistamine, anti-inflammatory, and anticancer properties. It also stabilizes cell membranes and reduces capillary fragility.
- Quinine
- An alkaloid drug derived from the cinchona plant used to treat malaria.
- Quinsy
- Acute inflammation of the tonsils and surrounding tissue, often leading to the formation of an abscess.
