Isosorbide Oral Solution (License No.H10960126 Trade name: Yi Si Qing) is a kind of permeable organization dehydrated intracranial pressure drop medicine exclusively produced by our company domestically and recognized at home and abroad. It is safe, efficient and convenient to take. The medicine is characterized by quick and full absorption, the effects on dropping intracranial pressure, long duration, without metabolism and calorie in the body.