Zheng Tian Wan is a TCM patent medicine for Headache. It is an OTC (over-the-counter) medicine available from various manufacturers as a general first-line remedy for Headaches and Migraine.
Some patent medicines develop a reputation for being effective for a particular disease without necessary differential diagnosis. They may achieve a high rate of efficacy regardless of the diagnosis, in some cases equal to or better than a formula written by a TCM doctor. These are Empiric remedies which often are the origin of a patent medicine
Chuanxiong, Dahurian Angelica, Pearl Powder, Kudzuvine, Pubescent Angelica, Siler, Uncaria, Safflower.