Clinical trial, with positive findings, on 14 patients treated at a podiatry clinic in the UK for heel pain due to tissue inflammation. Approximately half of the patients were randomly allocated to receive the homeopathic medicine Ruta graveolens and the others received a dummy pill (placebo); they were not told which treatment group they were in. By the fourth day and up to 2 weeks, patients in the homeopathy group had a greater reduction in pain than those in the placebo group.
Clark J, Percivall A (2000). A preliminary investigation into the effectiveness of the homeopathic remedy, Ruta graveolens, in the treatment of pain in plantar fasciitis. British Journal of Podiatry; 3:81–85.