Neural therapy What conditions are likely to be caused by an interference field? Any symptom related to bodily functions controlled by the autonomic nervous system, such as palpitations, brochospasm, indigestion, constipation, sexual dysfunction, dysmenorrhea or even cold hands or feet, may be partially or totally caused by an interference field. Chronic pain—especially migraine—often has an autonomic component such as nausea or sweating. An interference field may also be suspected if sciatica or any other leg pain is accompanied by coldness or change in skin color. How does neural therapy treat interference fields? If an interference field is found, it can be easily treated by injecting it with a local anesthetic. Caine anesthetics are cell membrane stabilizers and act on interference fields in the same way that lidocaine does in treating supraventricular arrhythmias. The effect of injecting interference fields is immediate. There is sometimes sudden relief of symptoms—a lightning reaction— but any response typically will occur within the first few days. How long does the relief last? More often than not, response to treatment of an interference field is temporary, sometimes lasting even less than a day. However, even a very short response is encouraging and indicates that treatment should be attempted again. Each time an interference field is treated, there should be a longer response. Treatment is then repeated until it is no longer required. How safe is neural therapy? Neural therapy is a remarkably safe medical treatment. The most commonly used anesthetics (procaine and lidocaine) rarely cause allergic reactions. Allergic reactions to these anesthetics in the past seem to have been caused by preservatives such as methylparaben. These preservatives are no longer used by most physicians practicing neural therapy. Occasionally, patients will feel faint for a few minutes after neural therapy injections. This may be caused by needle fright or by a short-lasting lowering of the blood pressure caused by the -caine anesthetic itself. Puncture of an internal organ is a theoretical possibility with certain injections. Because the needles used are of small caliber, this is rarely (if ever) of any consequence. What conditions may prevent successful treatment? Medications. The most common reason for poor response to neural therapy treatment is the presence of medication. Any drug with a prefix of “anti” tends to block the autonomic nervous system, e.g., antibiotics, anti-inflammatories, anti-depressants, anti-hypertensives. Illicit drugs will block it as well. Poor nutrition. Inadequate nutrition is much more common than most people realize. Mineral and vitamin deficiencies must be corrected or interference fields will either recur or the response to treatment will not increase with time. Toxins. Drugs, tobacco and alcohol may be considered toxins and can cause a poor response to neural therapy. Environmental toxins such as organic solvents, herbicides and fungicides also affect some people. The metals in dental amalgam fillings, especially mercury, poison the autonomic nervous system and may defeat neural therapy. When and where did neural therapy originate? Neural therapy was developed in Germany beginning in the 1920s. (See the FAQfor details.) A considerable body of scientific research supports its basic principles; unfortunately, almost all of the literature is published in German and has never been translated into English. Neural therapy is a remarkably safe and simple method of treating many medical problems and is taught in German medical schools. Only in recent years have some in the English-speaking world of medicine become aware of neural therapy.