Elimination of migraine-associated nausea in patients treated with rizatriptan orally disintegrating tablet (ODT): a randomized, double-blind, placebo-controlled study.
OBJECTIVE
To confirm the efficacy of rizatriptan 10 mg orally disintegrating tablet (ODT) for the elimination of migraine-associated nausea.


BACKGROUND
Pooled studies of rizatriptan analyzing elimination of nausea as a secondary endpoint showed that 65% of rizatriptan patients reported elimination of nausea at 2 hours compared with 41% of patients taking placebo.


METHODS
This was a multicenter, randomized, double-blind, placebo-controlled single-attack trial enrolling adult patients with at least a 6-month history of migraine who typically experience migraine-associated nausea. Patients treated a moderate or severe migraine headache at the earliest sign of nausea with either rizatriptan 10 mg ODT or placebo (2 : 1). The primary endpoint was elimination of nausea at 2 hours postdose, and the secondary endpoint was pain relief at 2 hours postdose.


RESULTS
Although not statistically significant, a greater percentage of patients had elimination of nausea at 2 hours with rizatriptan compared with placebo (70.3% vs 62.0%, P = .165, odds ratio [95% CI] = 1.45 [0.86, 2.46]). When patients were grouped by baseline headache severity, rizatriptan showed a greater advantage than placebo for patients with moderate pain (rizatriptan 72.8% vs placebo 57.4%), but no difference for patients with severe pain (rizatriptan 67.7% vs placebo 66.7%). There were significantly more patients who achieved 2-hour pain relief with rizatriptan (69.7% vs 54.3%, P = .012, odds ratio [95% CI] = 1.94 [1.16, 3.25]).


CONCLUSIONS
Although the efficacy of rizatriptan 10 mg ODT for the elimination of migraine-associated nausea was comparable to that seen in previous rizatriptan trials, the higher-than-usual placebo response prevented a finding of a statistically significant difference. There was a sizable difference in placebo response between patients who treated moderate vs severe migraine. Rizatriptan was effective for 2-hour pain relief.
Diamond Headache Clinic, Chicago, IL 60614, USA.
Fred
F
Freitag
Frederick R
FR
Taylor
Mohammed A
MA
Hamid
Anthony
A
Rodgers
Carolyn M
CM
Hustad
Karen E
KE
Ramsey
Franck
F
Skobieranda
D000284:Administration, Oral; D000328:Adult; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D008881:Migraine Disorders / Q000150:complications / Q000188:drug therapy*; D009325:Nausea / Q000209:etiology / Q000517:prevention & control*; D010919:Placebos; D017366:Serotonin Receptor Agonists / Q000008:administration & dosage*; D014230:Triazoles / Q000008:administration & dosage*; D014363:Tryptamines / Q000008:administration & dosage*
D010919:Placebos; D017366:Serotonin Receptor Agonists; D014230:Triazoles; D014363:Tryptamines; C093622:rizatriptan