For people interested in accutane/roaccutane (isostreninoin), start low at 20mg/day give it few weeks to fully "kick in" and do it's thing, at first especially fist week you might even get worse acne, but that's what I call clean your house period. Remember isotretinoin works by minimizing your oil production, it works very well, unfortunately be prepared for other side effects - that's why I mention low dosage.
No reason to go berserk with dosages and do the recommended crazy amounts, it is for severe cases when the risk of side effects are worth the effect to eliminate or at least reduce very bad cases of acne that also cause painful scars.
20mg/day for 6-9 weeks will clear our "steroid" acne in most cases, hell if that doesn't do much after few weeks then try 40mg/day, but there is no reason to go high dose like it says on the net.
20mg/day causes low side effects like lip and hair dryness, also facial, but not as much, whereas 60-70+ mg/day causes major side effects that makes it a suffering.
My own experience with the drug over the years, confirms what I said earlier, I had pretty bad acne on my back shoulders, chest that left bad scars, I had to visit dermatologist so she had to inject corticosteroids in to the tissue to break it down and flatten it, so you can imagine it was pretty bad. Years later they're still there, but covered by big tattoo's.
I've experience taking 70-80mg for a few months, but due to side effects and constant severe eye dryness, I had to quit. Second time I took 50 and then 60 and 70mg/day for total of 6 months, this time I had more experience and used very strong eye gel, not drops, so it was barely bearable so to speak. My experience sucked ass, but hey I had to cure my bad acne, so it was worth it for me.
After some years, when I first took anabolics, I experienced acne rebound, though not as bad and more like you mention in your post. I took 20mg/day for 9 weeks and it completely cured my acne.
I usually take low dose roaccutane twice a year for a month to be almost acne free, so I start with 20 for 2 weeks and then 10 for another 2 and that keeps me clear on cycles and come off to cruise levels (when it's the worst acne for me due to hormonal fluctuation).
Check list before you start: eye drops on hand or even gel if dryness is unbearable, lip balm this one a must, shampoo that is gentle and doesn't dry your hair out any further, face moisturizer on hand.
P.S. make sure you're otherwise healthy and study the said drug yourself before taking it, it's always best to consult your doctor, I just share information that I believe works for me and some other people I know.