Migrex 200 mg TabDescriptionTolfenamic acid (N-(2-methyl-3-chlorophenyl) anthranilic acid) belongs to the fenamate group and is a potent inhibitor of cyclo-oxygenase enzyme, thus inhibits the synthesis of important inflammatory mediators such as thromboxane (Tx) B2 and prostaglandin (PG) E2. Prostag..