If I could advise anything for your son it would be to please take Roaccutane! I am 21 now, but had bad acne from in my teenage years. I tried every single topical solution or tablets the doctor recommended to me, and none of them worked.
I dont know what your son is like, but acne did hit me pretty hard. Roaccutane has got some nasty side effects listed, mainly the depression side, but I have to say that acne was making me depressed anyway! The only problems I had were the usual dry skin, eyes and lips, but on the plus side your hair does not get greasy!
It took time (I had two courses, each lasting about 9 months, but mine was bad) but the results are absolutly astounding. My skin is clear since I have taken it (I do get the odd spot, but hey).
Another thing to think about is that if the doctor is recommending the tablets, you should take them as it is so hard to go through the NHS with Roaccutane. They are very hesitant; I had to go privatly and luckily for me my parents were wonderful and paid for everything, but at £90 for a five minute consultation, it cost alot.
When you have acne you just want what works, and it is upsetting trying the next new thing a friend of a friend has told you about and it does not work. Roaccutane really works and will continue to work once you have finished it. And even though I am a girl and boys are different, people making passing comments to me like "your skin looks great." made me so happy.
Please do not write Roaccutane off as it works, and it really does make you so much more confident. It may not be anything life threatening, but when you are a teenager it can sometimes feel as bad! I am so glad I took Roaccutane.