Are there toxicity or contraindication issues?
Where either product is used topically (and this pertains primarily to H3O), absolutely none. On the internal use of either H3O or HRx, we know of none – however, we would defer to the judgement of your health care professional. How you can approach the subject with an “anti-alternative therapy” practitioner is as follows: ask him or her if any significant changes in the pH of your “diet” could adversely affect the drug regimen you are currently taking. If your practitioner says “none,” then you should have nothing to worry about. If your practitioner says “yes,” listen carefully to your practitioner’s advice and follow their instructions.