I.V. Hydrogen Peroxide or I.V. Ozone can irritate or damage a vein if not done carefully. Sometimes, the flow need to be slower if a person feels sore or pain. And even the Registered Nurse or Physician sometimes cannot find a vein due to the patient has rolling veins, or collapsed vein. ( Don't ask me the definition for I only heard from the conversation in the I.V. room. ) Most of the technicians who did I.V.'s are Registered Nurse or Physician Assistant though one doctor hire Licenced Vocational Nurse only. I need to see how the Licenced Vocational Nurse did on other patients before I decided to visit that doctor or not.