There are a lot of good reasons for this which can be found all over the place elsewhere  and resources out there to help you.

But secondly, if you’re going to try and do that, please for the love of god do not use any of the NSAID pain relievers or acetaminophen.  No aspirin, no ibuprofen, no naproxen, no

ketoprofen (No aleve, no paracetamol, no motrin and so on and so forth).

It is a slow and agonizingly painful death.  These are acidic blood thinners.  They will damage your liver and destroy your gastrointestinal system while causing massive hemorrhaging.  

I’ve seen what a relatively small overdose caught in time can do to someone.  I have never in my life heard someone scream like that, and I hope I never hear anything like it again.  They didn’t sound human anymore.  Honestly, the word “scream” doesn’t feel like it can properly convey the horror of those awful noises, the anguish beyond anguish on their contorted face.  In most cases doctors will be able to save you, but the pain will be immense.  There will be vomiting and ungodly bloody diarrhea whether you live or die.  It will be REALLY REALLY bad.

Don’t do that to yourself.  Please, please do not choose that way to check out.