So my friend Johny has been doing both speed and codeine for quite a while now, but never at the same time. So he came up with an idea to mix those two, and his question is what's the amount he should use? Should he do speed first or the other way around? Or is it irrelevant? He's been doing give or take 5g of street amphetamine every weekend for last couple of months and 200-300mg of codeine almost every day.