Epidemiology
No circumstances are certain as to which an individual will get polymyalgia rheumatica, but a few factors show a relationship with the disorder:

Usually, PMR only affects adults over the age of 50. The average age of a person who has PMR is about 70 years old. Women are twice as likely to get PMR as men. Caucasians are more likely to get this disease. It is more likely to affect people of Northern European origin; Scandinavians are especially vulnerable. About 50% of people with temporal arteritis also have polymyalgia rheumatica. See also
Remitting seronegative symmetrical synovitis with pitting edema
Tocilizumab

References
External links
Questions and Answers about Polymyalgia Rheumatica and Giant Cell Arteritis - US National Institute of Arthritis and Musculoskeletal and Skin Diseases
Pronounced protective effect in animal poisoning with arsenic and mercury was first shown by I. Okonishnikova in 1962. In 1984, the now-defunct Bock Pharmaceutical Company requested the FDA grant approval for orphan drug status under the brand name Chemet and the FDA approved of this in 1991, providing exclusivity until 1998 which was conveyed to the successor Sanofi in 1996. References
Further reading
Aposhian, H.V. ; Aposhian, M.M. (1990). "Meso-2,3-dimercaptosuccinic acid: Chemical, pharmacological and toxicological properties of an orally effective metal chelating agent". Annual Review of Pharmacology and Toxicology. 30 (1): 279–306. doi:10.1146/annurev.pa.30.040190.001431. PMID 2160791. External links
"Succimer". Drug Information Portal. U.S. National Library of Medicine.