Clarification
Your concerns apply to Bob Beck's Blood Electrification Circuit. The zapper works on an entirely different principle. This is what Beck says:
Precautions: Badly debilitated patients such as full-blown AIDS victims should begin at less than 20 minutes every second day and flush by drinking lots of pure water, preferably ozonized, because their systems wilt go into rapid detoxification causing physical problems called Herxheimer's syndrome.
Users taking ANY medications, herbs, toxic vitamins or even traces of garlic in food should minimize such presence in blood for at least two days before starting and avoid irritants including coffee, tea, alcohol, tobacco, medications, recreational drugs, etc. during the several weeks of recovery. "Electroporation" is shown to increase dosage levels up to 20 times of anything drunk, shot, or ingested thus causing problems. This is documented by J.C. Weaver, Harvard-MIT, Jr. Cellular Biochemistry, 51:426-435,1993. Patients needing essential medications should take them immediately after turning off electrification and wait 24 hours before next blood cleansing. This lets their residues decay to minimum levels in plasma before re-electrifying. If detoxing becomes disturbing, proceed even more slowly. Symptoms may include fever, giddiness, dizziness, headaches, light-headed vagueness, nausea, skin rashes, eruptions, itching, boils, coughing, kidney and liver discomfort, aches, general malaise, inflammations, frequent urination, and sluggishness. Use caution when detoxing patients with impaired liver or kidney function. But remember it's far better to force wastes out of your system than leaving them stored where they may have been hiding for years.