A Placebo-Controlled Adaptive Treatment Assignment Study of Intravenous COL-144 in the Acute Treatment of Migraine

This study is set up: * to evaluate the efficacy (headache response at two hours) of a range of intravenous doses of COL-144 in order to select a dose range for further evaluation, * to explore the time course and effect of a range of dose levels of COL-144 on features of the migraine including: headache response, proportion of participants pain-free, headache recurrence, nausea, photophobia, phonophobia, disability, use of rescue medication, patient global impression and vomiting * to explore the safety and tolerability of a range of doses of COL-144 in terms of adverse events, physical exam, vital signs, laboratory evaluations, and ECGs * to determine key PK parameters for COL-144 and to explore the relationship between the PK of COL-144 and the time course and extent of clinical response