These homeopathic drug provings all follow good clinical practice (GCP) research guidelines and incorporate the guidelines suggested by Dr Samuel Hahnemann more than 200 years ago. For the 3rd edition twelve homeopathic drug provings, conducted by a number of internationally renowned proving directors, have been added. Dr Riley has developed research tools for data collection, symptom selection criteria and blinding primarily to address the risk of bias.The homeopathic drug provings published here are the result of this work. He has investigated the interplay between contemporary research methods and the research methods associated with homeopathic drug provings. Symphytum Officinale - a visual depiction of homeopathic remedy.This remedy of Symphytum Officinale is very effective in bones and bone related injuries. He was exposed to homeopathy in 1988 followed by study at the Hahnemann College of Homeopathy in Albany, California. Riley's interest in the research and subsequently the history and methodology of homeopathic drug provings began with his medical school training in 1979 and a residency in Internal Medicine.

Symphytum officinale materia medica