Chicory is often used with or as a substitute for coffee. It has no caffeine and offers a smooth roasted flavor comparable to that of coffee. Chicory is especially popular in New Orleans (Nuts, nd).
Although rare, allergic reactions to chicory may still occur. Since chicory is commonly mixed with other foods, it may be hard to isolate whether it caused a reaction. For further information, contact your allergist.
Chicory is often used as a substitute for coffee, and is known for its bitterness. Additionally, chicory is acknowledged as a working herbal medicine for some illnesses and injuries (Wikipedia, nd).