There are many guys who are on medications for hair loss. It's not older men who are using such tablets. Many young guys are using it to keep their hair rather than go bald. However, there can be side effects. It can affect sex drive and sperm. It may cause erectile dysfunction or inability to get it up. In addition, if you're planning to have kids with your partner, it's recommended you go off the medications for a few months to get your partner pregnant.