Forgive me, I'm dyslexic, didn't read your title properly. For hanging, well, it does give you a high, like all opium based pills and products. I guess it depends the dosage ingested, and if mixed with paracetamol or such. If so, you risk those cramps kicking in which can make your body search to fold on itself to relieve the pain.
But if the hanging is done right and you lose consciousness beforehand, I guess none of it matters. In any case, I'm sorry you feel troubled and need to go through with this.