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.