After study start, the Protocol was amended to clarifiy that the first triptan prescription must have been received by the participant within a time window of 3 months (± 2 weeks) prior to the participant being identified by the Investigator, and could be enrolled into the study within 6 months of taking the prescribed triptan medication for the first time and that use of a sample triptan would not disqualify a participant as long as the sample was of the same triptan that was eventually prescribed.
