Oral Rizatriptan Versus Oral Sumatriptan: A Direct Comparative Study in the Acute Treatment of Migraine
Abstract:Rizatriptan is a potent, oral, 5-HT1B/1D agonist with more rapid absorption and higher bioavailability than oral sumatriptan. It was postulated that this would result in more rapid onset of effect. This randomized, double-blind, triple-dummy, parallel-groups study compared rizatriptan 5 mg, rizatriptan 10 mg, sumatriptan 100 mg, and placebo in 1268 outpatients treating a single migraine attack. Headache relief rates after rizatriptan 10 mg were consistently higher than sumatriptan at all time points up to 2 hours, with significance at 1 hour (37% versus 28%, P=0.010). All active agents were significantly superior to placebo with regard to headache relief and pain freedom at 2 hours (P≤0.001). The primary efficacy endpoint of time to pain relief through 2 hours demonstrated that, after adjustment for age imbalance, rizatriptan 10 mg had earlier onset than sumatriptan 100 mg (P=0.032; hazard ratio 1.21). Rizatriptan 10 mg was also superior to sumatriptan on pain-free response (P=0.032), reduction in functional disability (P=0.015), and relief of nausea at 2 hours (P=0.010). Significantly fewer drug-related clinical adverse events were reported after rizatriptan 10 mg (33%, P=0.014) compared with sumatriptan 100 mg (41%). We conclude that rizatriptan 10 mg has a rapid onset of action and relieves headache and associated symptoms more effectively than sumatriptan 100 mg.
Document Type: Research Article
Affiliations: 1: From Bispebjerg Hospital, Copenhagen, Denmark (Dr. Tfelt-Hansen); 2: Merck & Co. Inc, West Point, Penn (Ms. Teall and Drs. Block, Reines, and Visser); 3: Fundacion Instituto Neurologico de Columbia, Bogota, Colombia (Dr. Rodriguez); 4: Universita degli Studi di Roma, Rome, Italy (Dr. Giacovazzo); 5: San Borja, Lima, Peru (Dr. Paz); and 6: Merck, Sharp & Dohme (Europe), Inc, Brussels, Belgium (Dr. Malbecq).
Publication date: 1998-11-01