Evaluation of the Efficacy of Diclofenac Potassium and Rimegepant for the Acute Treatment of Migraine

Inclusion Criteria: * Subject has provided informed consent prior to initiation of any study-specific activities/procedures. * Aged 18 to 65 years upon entry into screening * History of migraine (with or without aura) for greater than or equal to 12 months before screening according to the ICHD-3 criteria based on medical records and/or patient self-report. * Not more than 12 attacks per month with moderate to severe headache pain in each of the previous 3 months. Exclusion Criteria: Disease Related * Greater than 50 years of age at migraine onset * History of cluster headache or hemiplegic migraine headache * Inability to differentiate between migraine from other headaches * Has taken medication for acute treatment of headache (including acetaminophen, nonsteroidal anti-inflammatory drugs (NSAIDs), triptans, ergotamine, opioids, or combination analgesics) on 10 or more days per months in the previous 3 months * Has a history of migraine aura with diplopia or impairment of levels of consciousness, hemiplegic migraine, or retinal migraine. * Required hospital treatment of a migraine attack 3 or more times in the previous 6 months. Other Medical Conditions * The subject is at risk of self-harm or harm to others as evidenced by past suicidal behavior * Has a chronic non-headache pain condition requiring daily pain medication * Has a history of any prior gastrointestinal conditions (e.g., diarrhea syndromes, inflammatory bowel disease) that may affect the absorption or metabolism of investigational product; participants with prior gastric bariatric interventions which have been reversed are not excluded. * Has a history of malignancy in the prior 5 years, except for adequately treated basal cell or squamous cell skin cancer, or in situ cervical cancer. * History or evidence of any other clinically significant disorder, condition or disease (except for those outlined above) that, in the opinion of the investigator would pose a risk to subject safety or interfere with the study evaluation, procedures or completion Medication related * Start of new preventive migraine treatment within the last two months * Change in dosage of ongoing preventive migraine treatment within the last two months * Current preventive treatment with monoclonal antibodies targeting calcitonin gene related piptide (CGRP) or CGRP receptors, or current use of small-molecule CGRP receptor antagonist (e.g. erenumab, fremanezumab, galcaneszumab, atogeptant or rimegepant) * Changes in treatment with selective serotonin reuptake inhibitors (SSRI) or serotonin norepinephrine reuptake inhibitors (SNRI) within the last two months * Use of the following medication within 30 days prior to screening: * Strong and moderate cytochrome P450 3A4 (CYP3A4) inhibitors, including but not limited to systemic (oral/IV) itraconazole, ketoconazole, fluconazole; erythromycin, clarithromycin, telithromycin; diltiazem, verapamil; aprepitant; cyclosporine; nefazodone; cimetidine; quinine; and HIV protease inhibitors * Strong and moderate CYP3A4 inducers, including but not limited to barbiturates (eg, phenobarbital and primidone), systemic (oral/IV) glucocorticoids, nevirapine, efavirenz, pioglitazone, carbamazepine, phenytoin, rifampin, rifabutin, and St. John's wort * Inhibitors of the BCRP (breast cancer resistance protein) transporter (eg, rifampicin) * Drugs with narrow therapeutic margins (eg, digoxin, warfarin) Other Exclusions * Female subjects of childbearing potential with a positive pregnancy test assessed at screening or day 1 by a urine pregnancy test. * Female subject is pregnant or breastfeeding or planning to become pregnant or breastfeed during treatment and for an additional 16 weeks after the last dose of investigational product. * Female subjects of childbearing potential unwilling to use 1 acceptable method of effective contraception during treatment and for an additional 16 weeks after the last dose of investigational product. * Evidence of current pregnancy or breastfeeding per subject self-report or medical records * Subject has known sensitivity to any of the products or components to be administered during dosing. * Subject likely to not be available to complete all protocol-required study visits or procedures, and/or to comply with all required study procedures (e.g, Clinical Outcome Assessments) to the best of the subject and investigator's knowledge.