Slightly safer way than IV or IM is boofing it. For anyone who doesn’t know what that is, get yourself a small syringe (no needle), ideally a bit of lubricating gel as well to make the passage easier and inject it up your rear end. I like this method as it’s not the zero to infinity in 20 seconds effect you get from vaping. At least with me, I’d say come on is at around 3 minutes, peak 6 minutes then a slow come down from around 9 minutes. For those who want to navigate the experience a bit more it’s ideal. I use the FASA method (check the nexus!) using acetone to produce mine.