Question- does speed ever get laced with heroin?

[drugnurse]

hi all
I am just wanting to pick your expert brains.
What is the likelihood of the speed you buy being laced with heroin?
Does this happen?
why would you mix the 2 together?
what are the effects?
Will appreciate feedback from those that know.

 

[coelophysis]

There's really no way to know for sure. How would we be able to tell what random drug dealer A chooses to sell to drug buyer A.
It doesn't seem likely that the two would be thrown together and then sold as one though.
But you never know for sure.