Table 1.

Summary of studies looking at consistency of effect for rizatriptan

Study	Sample size	Comparison	Outcome measures	Results
Dahlof, 20003	250	Rizatriptan 10 mg in three of four attacks, or rizatriptan 10 mg in all four attacks	Pain relief at two hours	Three of four attacks: 86% pain relief at two hours in at least two of three attacks. All four attacks: 73% pain relief in at least three of four attacks
Block, 19984	1,831	Rizatriptan 10 mg, 5 mg or standard treatment	Pain relief at two hours	90% for 10 mg, 80% for 5 mg, 70% for standard treatment
Göbel, 20015	25,501	Tolerance to rizatriptan use in up to three attacks	Tolerance, headache relief	No tolerance with repeated use 79% had headache relief within one hour