The simplest risk of Minoxidil is experiencing hair growth in areas not desired due to accidental application. The only way to avoid this is to practice extra care with the application of the drug, and the immediate washing of any part not intended for hair growth.

The other common risks or topical minoxidil are typical skin itching and irritation of the treated area. These usually subside after two weeks of use, if otherwise, the use is to be stopped, and consultation from a physician is necessary.

The greater risks of Minoxidil are changes in vision, most commonly blurred vision, chest pain, very low blood pressure, decreased sexual desire, fast or irregular heartbeat, flushing of the skin, headache, lightheadedness, numbness or tingling in the hands, feet, or face, partial, or complete, impotence, rapid weight gain, and swelling of the hands, feet, lower legs, or face.