The quantity needed will be based on how much you weigh. I took 40 tabs of dephahydramine (an antihistamine) and I had pale skin, blurry vision, almost fully dilated pupils, physical hallucinations of sharp pains, visible hallucinations, and tactile hallucinations with general somatic hallucinations. (Insects that I have a fear of all over me while I was trying to get my sister to help me.) I only knew that one wasn't real because I asked my sister if she heard me calling her and she didn't.(I was moderately loud.) Also loss of coordination and inability to walk after an hour of the drug OD. (Aftermath of overdosing on the drug is brain damage.)
I can't remember all the feelings and that wasn't the last overdose but I still remember it. My liver doesn't die even if I'm about to die, I just don't have any luck.
I overdosed more times than I can count but I still survived but for others it might be different and more peaceful. I hope everyone gets the Peace they deserve.