This study tests a medicine called elismetrep to see if it's safe to use for treating migraine headaches over a long time. Migraine is a type of headache that can cause severe pain, often with other symptoms like nausea or sensitivity to light. To join, you must have been in a past study with elismetrep and completed all necessary tasks. You should be able to use a smartphone to record your experiences and agree not to become pregnant during the study. You shouldn't join if you're pregnant, have certain health changes, are at risk of self-harm, or have surgery planned. You also can't join if you've been in this study before.

• Study Participation: You will need to attend multiple study visits and complete diary entries.
• Potential Risks: Be aware of possible side effects or any new health changes.
• Safety Measures: Regular check-ins and assessments with the study team.