Yes, minoxidil, commonly used for hair regrowth, can have side effects. Some people may experience scalp irritation, dryness, or itching. Additionally, it might lead to increased hair shedding initially before new hair growth begins. In some cases, people may experience unwanted hair growth in other areas of the body due to minoxidil. It's essential to follow the instructions provided and consult a healthcare professional if you have concerns about its use or experience any adverse effects.