Though rare, allergic reactions have occurred after the application of Ininoxidil. An allergic reaction MY be characterized by such symptoms as itching, swelling, redness, and a match. The reactions may be caused by one or more ingredients in the solution, including the Minoxidil, alcohol, Propylene glycol, and the Preservatives problems may also result from dil into the the absorption of Minoxidil body, though this is extremely rare. Hair may grow in areas other than the scalp, and heart Pro ems, such as irregular beating and enlargement of the heart, may Occur, Those using minoxidil on a regular basis should be monitored by their physician, though a prescription is no longer required. if any side effects do occur, use of minoxidil rnust be discontinued Immediately and the Physician contacted.