Will Doxycycline work again or as well for LPP if I had to stop treatment for a few months?

I was taking 100 mg/day of Doxycycline to help treat hair loss from LPP and it did seem to be working to some degree. However, I was experiencing some side effects & so had to stop for a few months. If I start to take the Doxycycline again, will it be as effective or help at all? I have read that sometimes treatments for hair loss do not work as well if you stop and then restart them.