Most illicitly-made drugs are made in dirty apartments, kitchens, bathrooms, and warehouses. They might even be marketed as providing a “safe-high” even though they are made with highly addictive substances such as heroin or fentanyl. This is done intentionally to create a dependency that keeps customers coming back for more, time and time again.
While the use of pharmaceutical drugs carry some risks, street drugs bring with them entirely more dangerous possibilities, as the contents are truly known. MDMA, ecstasy, methamphetamines, and other street and synthetic drugs could have been “manufactured” in any number of environments with unsanitary practices to boot.