Orphenadrine Citrate is marketed under different brand names including Disipal, Lysantin, Mefenamine, Norflex, and Orphenadrine. The chemical formula of the compound is C24H31NO8 and the IUPAC name is N, N-dimethyl-2-[(2-methylphenyl)-phenylmethoxy] ethanamine; 2-hydroxypropane-1,2,3-tricarboxylic acid. It is a type of muscarinic antagonist and is widely used in the treatment of drug-induced parkinsonism and to relieve pain from muscle spasm. The drug is sometimes also used to treat pain arising from rheumatoid arthritis. The molar mass of the compound is 461.511 g/mol.