I've been on doxycycline for a little more than mo. & my acne doesn't seem to be getting better i started with 100mg now 200 when will i see results ?

Sometimes patience: .. does pay off. Acne treatment requires oodles of it.. and then some. If you haven't had to try 5 different treatment regimen, then you are luckier than most. Doxycycline is an antibiotic and will need some time, maybe 2-3 months, before you see positive results. Keep close contact with your healthcare professional and you will improve.