Help Do you know any medication that's fairly common and can trigger unconsciousness if overdosed?

[curiousbeing]

It's ok if it's sold only with prescription. Should i use sleeping pills? Or blood pressure lowering pills? Just need to trigger unconsciousness or become heavily drowsy.

My method: faint, lose consciousness for some 10 minutes and be drown


I tried ligature strangulation. It didn't make me dizzy no matter how hard I pulled it
Just 10 minutes of unconsciousness is okay for me. No need for a drug that can keep me unconscious for hours