As you probably see on yourself, acne is a common side effect of using
Anabolic Steroids.

To prevent acne without drugs, go to your local drug store and buy an
antibacterial soap. The brand names may differ from country to country,
in my country they are Protex, Safeguard, Lifebuoy. Some of them have
levels of antibacterial protection, pick the strongest one. Don't buy
these with built "natural hydratants" or "lipids". It must be plain
antibacterial soap. Wash yourself with this 2-3 times per day. You
can't cream yourself.

It works, but it isn't a cure for heavy acne, it is a prevention.
I invented this accidentally. The side effect of antibacterial soap is
that it dries skin. If your skin is dry, you can't get serious acne. I
am a semi-heavy AAS user and i hardly have some acne. I realized that
other users have a lot of acne. It can't be by genetics, I also had
acne in puberty.

I am pretty bacteriophobic so I use antibacterial soap for washing
myself instead of shower gel. These sophisticated shower gels contain
hydrating compounds or lipids and this keeps the skin greasy. I
shower 2-3 times a day with this soap, and my skin stays dry, that's
because I have no acne. To get acne, your skin must be greasy.

These anti-acne drugs also work by drying skin. You'll see, that these
antibacterial soaps are really harsh, for example if you wash your hands
with it very frequently, the skin will be dry and red.