Anise, also called aniseed, is a flowering plant native to the eastern Mediterranean region and Southwest Asia. Its flavor has similarities with some other spices, such as star anise, fennel, and liquorice (Wikipedia, nd).
Anise can be used as both a cooking spice and a medical supplement. Although uncommon, allergic reactions to anise can still occur. If you feel like you are having an allergic reaction, contact your allergist (Livestrong, 2014).
Anise is commonly used to add a characteristic flavor to foods or alcohol. It also has medical uses, such as treating cramps and killing insects (Wikipedia, nd).