What is the best way to combine the following sentences?Sterioid users often experience depressions. They are mot using the drugs. This pattern...

I think your present version is quite good, though I have
corrected several misspellings and added a word in the example below. (The boldface
words indicate corrections.)

readability="8">

"When they are not using drugs,
steroid users often experience
depression, which typically leads to increased use of
the
drug."

If you can identify
different types (or forms) of depression, then you might want to alter it to
say

"...
experience different forms of
depression,..."

Another
example might be the following:

readability="7">

"Steroid users often experience depression when
they are not using drugs, which typically leads to increased use of the
drug."

or,

readability="7">

"Steroid users often experience different forms
of depression when they are not using drugs, which typically leads to increased use of
the drug."