Correct spelling for the English word "citarin" is [sˈɪtəɹˌɪn], [sˈɪtəɹˌɪn], [s_ˈɪ_t_ə_ɹ_ˌɪ_n] (IPA phonetic alphabet).
Trade name of sodium anhydromethylene citrate, a compound of sodium citrate and formaldehyde; used in rheumatism and gout in doses of gr. 15-30 (1.0-2.0), being said to liberate formaldehyde in the blood.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.