Just had this discussion last night, regarding likelihood of fentanyl in the speed. I get so goddamned constipated when using meth that I have suspected for some time that there must be a measurable cross contamination present. I asked my homeboy that is in the biz and he affirmed the suspicions, and has intermittently tested samples finding positive results. His opinion is that it is an intentional additive to facilitate customers as it is so addictive. All the dealers I have ever known have business out the ass, so if my friend is correct, that is a pathological and malignant greed of an insatiable and defective void of a human that deserves a thorough beat down. The selling of deadly doses of the wrong drug to unwitting people is psychopathic and individuals identified as doing such need the barrel treatment or a long swim to the bottom of the ocean.