Duarte C, Dunaway F, Turner L, Aldag J, Frederick R Ketorolac versus meperidine and hydroxyzine in the treatment of acute migraine headache: a randomized, prospective, double-blind trial. Ann Emerg Med. 1992 Sep;21(9):1116-21.
Factor SA, Jankovic J Randomized trial of IV valproate vs metoclopramide vs ketorolac for acute migraine. Neurology. 2014 Oct 7;83(15):1388-9. doi: 10.1212/01.wnl.0000455698.16732.0a.
Garnock-Jones KP Diclofenac potassium powder for oral solution: a review of its use in patients with acute migraine. CNS Drugs. 2014 Aug;28(8):761-8. doi: 10.1007/s40263-014-0186-y. Review.
Lipton RB, Grosberg B, Singer RP, Pearlman SH, Sorrentino JV, Quiring JN, Saper JR Efficacy and tolerability of a new powdered formulation of diclofenac potassium for oral solution for the acute treatment of migraine: results from the International Migraine Pain Assessment Clinical Trial (IMPACT). Cephalalgia. 2010 Nov;30(11):1336-45. doi: 10.1177/0333102410367523. Epub 2010 Apr 7.
Marmura MJ, Silberstein SD, Schwedt TJ The acute treatment of migraine in adults: the american headache society evidence assessment of migraine pharmacotherapies. Headache. 2015 Jan;55(1):3-20. doi: 10.1111/head.12499. Review.
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
