I've done IV chelation for 3 years of my life, with up to 3 injections a week, and have been absolutely fine. As long as there is a registered GP who is monitoring the process, then you are completely safe.
FYI, while I was doing the IV injections, there were also other patients with me, ages from 1 years old to 82 years old, all of whom go several times a week as well. Hope that provides comfort to all of you out there who have doubts about the safety of IV chelation.