You CAN take it longer with TONS of other things to combat it's side effects... but... I wouldn't ever suggest it.
What exactly are you trying to do? licorice and spearmint tea are both anti-androgens, and spearmint tea is kinda a mild one...
I'd suggest instead Saw Palmetto and Chinese Skullcap for an anti-androgen combo.
You still need an estrogen to do any growing, and for us, there are really only three options. Pueraria Mirifica, Bovine Ovary, or both.
You should also take a Progesterone Cream with PM, but not BO.
I actually went estrogen dominant from increasing my PM dose by just one drop and not increasing my PC.