Correct spelling for the English word "Brayerin" is [bɹˈe͡ɪəɹˌɪn], [bɹˈeɪəɹˌɪn], [b_ɹ_ˈeɪ_ə_ɹ_ˌɪ_n] (IPA phonetic alphabet).
A resinous principle of bitter taste obtained from brayera; anthelmintic in doses of gr. 15-30 (1.0-2.0).
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.