And this isn't just limited to K. If you use any drugs besides weed/shrooms, I highly recommend getting a test kit and testing before ingesting. Not just because of the risk of fentanyl, but because frequently the drug won't be what you think it is or will be cut with something else that could be dangerous. Doing drugs safely begins with knowing what you're taking. You don't want to find out only after you've taken it that your molly is meth or your acid is some random research chem that might kill you.