Just to let everyone know, you can have niacin injections made at any compounding pharmacy. However, you do need a prescription even though niacin is an over the counter drug in the U.S. I just had 20ml (100mg/ml) of nicotinic acid injections made for me for 50 US dollars. If you do decide to get a prescription, you need to tell your doctor and the pharmacy that you want "nicotinic acid" and not niacinimide or nicotanimide, because they routinely use the non-flush niacin when they make custom B vitamin complex injections for people. (they probably dont have pure pharmaceutical grade nicotinic acid on hand to make injections, so they may have to order it before they make it)