Some doctors worry about rare side effects from taking hair loss prevention drugs

As hair loss prevention drugs continue to rise in popularity, some doctors are questioning whether more men will experience rate side effects. According to an Epic Research report, there’s been a 200% increase in prescriptions for finasteride, the main drug used to combat baldness, over the past seven years. NBC News’ medical fellow, Dr. Akshay Syal, explains the particulars of the drug finasteride and its possible side effects.