Definitely good quality HR here, after reading this my curiosity with speed balls has feigned.. I've always been curious about SB overdoses as well. What I've ingested from this thread is that because coke has a short half life, well significantly shorter then H, the respiratory depression type overdose happens when using more dope because the cocaine rush / high kinda masks your ability to gauge intoxication according to the initial buzz? So if I do a SB and use more then my average dose of H to combat the cocaine, the situation that is inherently deadly occurs when the coke wears off and stops combating the dope? How long does this usually take?