What is trental (pentoxifylline) used to treat?

PAD bad circulation: Trental (pentoxifylline) is given to treat symptoms of peripheral arterial disease (pad). In particular, it is used when someone gets leg cramping when they walk. Other treatments for this problem include: regular exercise, quitting smoking, controlling cholesterol and maintaining blood pressure levels. The evaluation for pad includes comparing blood pressure in the arm and legs, an "ankle-brachial index.".