Yes it is rather bitter (try multiple short steeps to deal with this) but it does make me feel a lot better. This is what I drink every night before bedtime.
Green Mountain Green Water
Green Mountain Green Water, this Bitter Spike herbal tea was originally called Dong Qing in the Bencao Gangmu refers to the fact that it is an evergreen tree mostly from Sichuan province, China. It has no caffeine. Perfect beverage for late evenings. In traditional Chinese medicine terms, it is used to disperse wind-heat, clear the head and the eyes, and resolve toxin, thus being used for common cold, rhinitis, itching eyes, red eyes, and headache. In addition, it is said to calm fidgets and alleviate thirst, especially when one is suffering from a disease that causes fever or severe diarrhea. It transforms phlegm and alleviates coughing, thus used in treating bronchitis. Finally, it is said to invigorate digestion and improve mental focus and memory.