I can't say I've tried IV.. I don't have the steady hands/guts/desire to go down that route. Recently I discovered the joys of ketamine via IM and have tried various other things via IM since. Ethylphenidate being one of them. The first time I tried doing this I put out what I would consider to be a large sized line (that I am plenty used to) in the spoon and got down to business... big fucking mistake. I used WAYY too much. It blew my fucking face off. And not in a good way. I was on the verge of a panic attack for about 3-4 hours. It was reallly unpleasant and horrible, one of the most uncomfortable experiences of my life, and naturally my Etizolam wasn't arriving til the morning. Since then I have tried again with DRAMATICALLY smaller amounts and yes it does work. But for some reason there's no euphoria when using this ROA. You just kinda notice that you're gurning after about 10 minutes, and feel the stimulant sides of it but no euphoria so overall kinda of a bust method :/ I guess it's best left to the nose if you ask me, just a shame that it fucks your nose so badly. Mine has suffered enough over the years lol!