Evidence-Based Human Homeopathy and Veterinary Homeopathy. Comment on Bergh et al. A Systematic Review of Complementary and Alternative Veterinary Medicine: "Miscellaneous Therapies".

(1) Background: Classical (=individualized) homeopathic therapy is based on the individual and not on the indication. (2) Methods: The prerequisite for conducting methodologically high-quality studies on indvidualized homeopathy is that the principles of homeopathy are considered, since the selection of the simile (the individually appropriate homeopathic medicinal product) is decisive for the effectiveness of the homeopathic treatment, because only an application lege artis can be effective for the respective patient. Apart from this, criteria for evidence-based medicine must be considered for design, conduction, documentation, and rating of studies in homeopathy. (3) Results: When criteria for evidence-based medicine for design, conduction, documentation, and rating of studies in homeopathy are considered, effects on all quality levels according to Cochrane criteria are recognizable, especially for individualized homeopathy, even in the methodologically high-quality studies. (4) Conclusions: Based on the following three facts, the discussion of the evidence in human and veterinary homeopathy lays the foundations for a comprehensive presentation of the evidence on homeopathy: (a) homeopathic medicinal products without indication are 100% identical with regard to production, quality, safety, and principles of application, regardless of whether they are used in animals or humans; (b) if the simile principle (