The figure you are referencing is for the replacement cocktail for Pentobarbital, before they introduced DDMP2. The LD50 is actually 60x50mg tablets according to LostAllHope. Wiki.Books says 4g, and then medical reports and nursing websites say 2.8+. The powder is again not how you want to do it, as someone who crushed up 10g of 25 mg tablets and tried mixing with apple sauce to help get it down, there is a lot more powder than you think. You can reduce the pills by half by buying extra strength tablets, I personally have 144x50mg to equal out to 7.2g.
I thought we did this in my thread already Sael, because I remember telling you this exact information and then when asking you to follow up you never did. I am unsure where you are finding this figure of the LD50 being 7-8g, like I have said before, send a link and I will more than happily say I was wrong and apologize. I do appreciate that you are at least saying it can work but Sael I don't think you were given all the facts when you had your thread about it open.
Most people who report taking lethal doses who survive don't recall their experience as the mind shuts down to a certain extent, those who do remember do recall some hallucations but that is why we combine the alcohol or benzo's with it to help put you and keep you asleep (don't need short and long acting may not be a bad idea though, cocktail does just say valium for it). You would ideally want 24 hours alone but you only need 18 at max. Cardiotoxicity takes place 2-18 hours after the ingested dose. The 24 hour number is the time in which if you are still alive (without medical intervention) you will likely live but hey extra time isn't a bad thing if you have the luxary.
You would need to take meto to help prevent vomiting as with most OD's. Also again just want to say that the 20g number was only used in the replacement cocktail for pento, but in most other overdoses 2.8g-7.5g (or 40mg+ per kg) are the range for successfull attempts from the reports I have seen. Only thing I have seen suggesting needing more is that cocktail (asks for 43g of pills which is why they replaced with DDMP2) or the LD50 in rats (500mg per kg) but they are much different than humans.
I will be trying to post a full detailed method thread later today or tomorrow so people can get the proper information about this and the diphen process that way they can make an informed decision.
Legal: I am in no means encouraging or telling you to harm yourself in any way I am just providing information what you do with it is entirely on you/your choice. If recovery is a possiblity it should always be considered but it is entirely your decision and will support you in whatever you choose.