I have 50mg Inderal proponalol, when I take it to test its effect on me it only makes me weak and incredibly sleepy. I plan to use it to accompany in my SN intake T-15mins probably. Actually I read somewhere here it's needed to be at least 10x50mg along with SN but I plan to take only 5x50mg as it's already super strong for me. Effects include body weakness and sleepiness, low heart rate. I dont think it can kill you on its own and it will be painful to wake up on it just my guess.