Minoxidil solution and foam are used to treat male pattern baldness in an effort to promote hair growth. It is not used to cure male frontal baldness or receding hairlines. How Long Does Take To Show Any Sign Of Improvement? Minoxidil, which is available in liquid and foam form, can be used to treat male pattern baldness and hair loss. Increased or excessive minoxidil dosage can have negative side effects in addition to not producing better or faster results. The thinning of men's hairlines is not considered. Before using any topical treatments containing minoxidil, you should dry your scalp. It can also be used to wet hair, though. Other body areas shouldn't be treated with minoxidil unless a doctor has prescribed it. Minoxidil should not be used to skin that is inflamed, irritated, cut, painful, scraped, or infected. Dry them off after washing them properly.