If you check the thread called List of Resources near the top of the forum, you'll find miles of highly informative links. One is about abbreviations used on this site, in which you'll find that SN is sodium nitrite, a substance that a lot of people consider using because it's not expensive and relatively easy to get.
There are only a few combinations of pills + alcohol that are considered reliable. Others tend to just make your situation worse than it already is.
Have a goid browse through the List of Resources. Happy researching