A recent clinical trial evaluating homeopathic medicine was a unique study of the treatment of asthma.6 Researchers at the University of Glasgow used conventional allergy testing to discover which substances these asthma patients were most allergic to. Once this was determined, the subjects were randomized into treatment and placebo groups. Those patients chosen for treatment were given the 30c potency of the substance to which they were most allergic (the most common substance was house dust mite). The researchers called this unique method of individualizing remedies "homeopathic immunotherapy" (homeopathic medicines are usually prescribed based on the patient's idiosyncratic symptoms, not on laboratory analysis or diagnostic categories). Subjects in this experiment were evaluated by both homeopathic and conventional physicians.
This study showed that 82% of the patients given a homeopathic medicine improved, while only 38% of patients given a placebo experienced a similar degree of relief. When asked if they felt the patient received the homeopathic medicine or the placebo, both the patients and the doctors tended to guess correctly.