^Freitag, Frederick G.; Cady, Roger; DiSerio, Frank (20 Dec 2001). "Comparative Study of a Combination of Isometheptene Mucate, Dichloralphenazone With Acetaminophen and Sumatriptan Succinate in the Treatment of Migraine". Headache. 41 (4): 391–8. doi:10.1046/j.1526-4610.2001.111006391.x. PMID11318886. S2CID35970757.