As a general rule, it's relatively unusual for methamphetamine users to get into fentanyl/heroin and vice versa. Two different scenes. Now, there are always a

As a general rule, it's relatively unusual for methamphetamine users to get into fentanyl/heroin and vice versa. Two different scenes. Now, there are always a few "garbagehead" addicts that'll use whatever you got, but that's not common in my experience, since opiate addicts chase calm, sleepy euphoria and meth/cocaine addicts chase stimulating, energetic euphoria. Different scenes, different personality types. Probably different genetics as well.