Inclusion Criteria:

• Have a diagnosis of migraine with an average of ≥2 to ≤6 attacks/month
• Female subjects of child-bearing potential must agree to use acceptable birth control
• Have abdominal or thigh injection sites that have sufficient subcutaneous tissue for needle-free injection
• Fluent in the spoken and written English language
• Provide written informed consent to participate in the study and be willing to comply with the study procedures
• Access to a telephone for call center interactions

Exclusion Criteria:

• A history, symptoms, or signs of ischemic cardiac, cerebrovascular, or peripheral vascular syndromes including ischemic or vasospastic coronary artery disease
• Other significant underlying cardiovascular diseases including uncontrolled hypertension
• Hemiplegic or basilar migraine
• A history or diagnosis of severe hepatic or renal impairment
• A history of epilepsy or seizure or other serious neurologic condition
• A history of allergy, anaphylaxis, or hypersensitivity to sumatriptan or any of its components or similar drugs
• A history of scleroderma (systemic sclerosis) or any skin condition that may adversely affect the injection or absorption of subcutaneously administered medications
• Tattoos in the thigh or abdominal area that are large enough to restrict injection site selection and/or evaluation
• Birthmark or other significant skin discoloration in the thigh or abdominal area large enough to restrict injection site selection and/or evaluation
• Pregnancy or breast-feeding
• Have participated in a clinical trial or receipt of an experimental therapy within 30 days prior to dosing