Telcagepant (MK-0974) Long-Term Safety Study in Adult Participants With Acute Migraine (MK-0974-012)

Triptan-related AEs are defined as: chest pain, chest tightness, asthenia, paraesthesia, dysaesthesia or hyperaesthesia. Participants were monitored for triptan-related AEs for 14 days after any dose of study drug.

An AE is defined as any unfavorable and unintended change in the structure, function, or chemistry of the body temporally associated with the use of the study product, whether or not considered related to the use of the product. Any worsening (i.e., any clinically significant adverse change in frequency and/or intensity) of a preexisting condition which is temporally associated with the use of the study product, is also an AE. A clinical AE was an AE reported as a result of a clinical examination. Participants were monitored for clinical AEs for 14 days after any dose of study drug.

An AE is defined as any unfavorable and unintended change in the structure, function, or chemistry of the body temporally associated with the use of the study product, whether or not considered related to the use of the product. Any worsening (i.e., any clinically significant adverse change in frequency and/or intensity) of a preexisting condition which is temporally associated with the use of the study product, is also an AE. A laboratory AE was an AE reported as a result of a laboratory assessment or test. Participants were monitored for laboratory AEs for 14 days after any dose of study drug.

Predefined limits of change were established for vital sign measurements: Systolic Blood Pressure (>=180 mm Hg and 20 mm Hg increase OR <=90 mm Hg and 20 mm Hg decrease), Diastolic Blood Pressure (>=105 mm Hg and 15 mm Hg increase OR <=50 mm Hg and 15 mm Hg decrease), Pulse (>=120 beats per minute [bpm] and 15 bpm increase OR <=50 bpm and 15 bpm decrease), Body Temperature (>38º C [oral equivalent]) and Respiratory Rate (>25 or increase of 10 OR <5 or decrease of 10 [per minute]). Participants were monitored for vital sign measurements outside predefined limits of change for 14 days after any dose of study drug.

Participants were asked to rate their migraine headache severity with ratings of 0=No pain, 1=Mild pain, 2=Moderate pain, and 3=Severe pain. PF at 2 hours post-dose is defined as a decrease from mild, moderate or severe migraine headache (Grade 1, 2, or 3) at baseline to no pain (Grade 0) 2 hours post-dose.