Tolfenamic acid is an aminobenzoic acid derived from anthranilic acid, with one hydrogen on the nitrogen replaced by a 3-chloro-2-methylphenyl group. It is used for relieving migraine pain and exhibits anticancer activity. It functions as a non-steroidal anti-inflammatory drug, a non-narcotic analgesic, an inhibitor of prostaglandin-endoperoxide synthase (EC 1.14.99.1) and pantothenate kinase (EC 2.7.1.33). It is classified as an aminobenzoic acid, an organochlorine compound, and a secondary amino compound, and is functionally related to anthranilic acid.