Everything is relative , the effectiveness of the drug and the individual's immune system and immunity are disproportionate. Based on this calculation, an estimated 15 to 60+ tablets can kill someone. Sleeping pills usually destroy the connection of the brain with our respiratory system. This means that the brain cannot send breathing signals, resulting in death due to lack of oxygen. The more active your nervous system, the more overdose you will need to die. Yet, above all, death is in the hands of Allah .