Yes, there is the use of systemic minoxidil which can grow the hair. The side effects are typical minoxidil side effects like low blood pressure.  You need to find a doctor willing to prescribe this.  I generally recommend that you first try the finasteride and as 90+% of people tolerate it well, there is no need to go to an alternative; however, if you are the 4% that has sexual side effects, then I would prescribe the oral minoxidil. This drug was used in its oral form in India and other poor countries that could not get finasteride with great reported results I have heard at medical meetings. Some doctors in the US are also reporting good results with the oral form of minoxidil.