Hi Tanya,
Any additions in the beginning are certainly not recommended. When you start with treatment, do it without any additions. They do not increase effectiveness, so I always recommend to initially start therapy just with your regular tap water. Regular tap water is good enough to achieve first results. So you might as well leave them out!!
Only after you’ve no success with Iontophoresis should the additions be tested . Robinul for example must be prescribed by a doctor and you have to do the treatments under your Doctors’ supervision.
Should you have any further questions, please do not hesitate to response here.
Charmaine