How effective is accutane for folliculitis/acne on the butt?

I’ve had some pretty bad facial acne and some pretty bad (and chronic) butt breakouts as well that are quite confident reducing. I’ve been on 80 mg of accutane for 6 months and my face acne has cleared up entirely (luckily no scarring!!), but I have seen little to no improvement on my backside. Should I stay on accutane if I can technically finish my course for my face? What other methods can i seek out? I really really just want to get rid of this folliculitis and any help is appreciated