Will Propecia work if you've already taken it before?

[Spartan]

A few years back I started taking Propecia to help prevent my hairline from receding. I took it for about a year and I felt like it was doing it's job. I didn't notice any new growth, but my hairline seemed to stabilize. Because of school and other circumstances, I got to the point to where I could no longer afford to purchase Propecia because I had other financial obligations. I've been off of it for about two years now, and over the past year I've been noticing that my is hairline receding again. Do you think I'd see the same results if I started taking Propecia a second time or is this something your body could develop a resistance to?