Due to budget limitations, the company decided to withdraw this study.

The purpose of this study is to determine whether a fixed-dose combination of naratriptan 2,5 mg + naproxen 500 mg is effective and safe compared each monotherapy for the acute treatment of migraine.

Inclusion Criteria:

• Male or female patient, age in the range of 18-65 years inclusive that has onset of migraine before age 50;
• Patient has at least a 3-month history of migraine with or without aura according to the ICHD-II, 2004, IHS (International Headache Society) criteria;
• Patients experienced an average migraine headache frequency of 2-6 moderate or severe attacks per month in the last 03 months prior to screening visit;
• Patients able to distinguish his/her migraine attacks from any other types of headaches;
• Patients able to understand and consent to participate in this clinical study, expressed by signing the Informed Consent (IC).

Exclusion Criteria:

• History of more than 6 migraine attacks/month in the last 03 months prior to screening visit;
• History of non-migraine headache frequency ≥ 15 days/month in each of the 3 months prior to screening;
• History of following migraine variants, according to the ICHD-II, 2004, IHS (International Headache Society): basilar migraine, aura without headache, familial hemiplegic migraine, sporadic hemiplegic migraine or aura with non-migraine headache;
• If female of childbearing potential, has a negative urine pregnancy test at Visit 0 and doesn't use, or doesn't agree to use, for the duration of the study, a medically acceptable form of contraception as determined by the investigator;
• Woman in pregnancy or lactation period;
• History of epilepsy or psychiatric condition that may affect the compliance of the treatment;
• Patients in acupuncture treatment for the symptoms of migraine attacks;
• History or symptoms of cardiovascular disease (myocardial infarction, ischemic heart disease, or with Prinzmetal's angina) or has symptoms of ischemic heart disease;
• Suffers from peripheral vascular disease;
• History of cerebrovascular pathology including stroke and/or transient ischemic attacks;
• History of allergic reactions to naproxen preparations, including subjects in whom aspirin or other NSAID drugs induce the syndrome of asthma, rhinitis, nasal polyps or urticaria;
• Diagnosis of renal or hepatic failure;
• Has significant (as determined by the investigator) cardiovascular risk factors that may include uncontrolled high blood pressure, post-menopausal women, males over 40 years old, hypercholesterolemia, obesity, diabetes mellitus, smoking, or a family history of cardiovascular disease in a 1st degree relative;
• Patients who have stopped or changed the dosage of the preventive treatment of migraine in the last 2 weeks prior the screening visit (V0), including the use of calcium channel blockers, tricyclic antidepressants, beta blockers or serotonergic medications for any other indications;
• Use of prohibited medicine as shown in 9.3 item of this protocol;
• Inability to understand and report the categorical scale debilitating functional of study or symptoms diary;
• Has abused, in the opinion of the Investigator, any of the following drugs, currently or within the past 2 years: opioids, alcohol, barbiturates, benzodiazepine, cocaine or abuse of drugs for migraine treatment including narcotics or ergotamines headache in the past 03 months;
• Hypersensitivity to naratriptan, naproxen, or any of its components;
• Hypersensitivity to sulfonamides;
• History of malignancy ≤ 5 years or > 5 years without documentation of remission / cure, for example, melanoma, leukemia, lymphoma, myeloproliferative disorders and renal cell carcinoma of any duration. Exception: Subjects with basal cell skin cancers, squamous cell, and cervical cancer in situ may be eligible;
• Participation in last one year of clinical protocols, unless it can be direct benefit to patient;
• Any finding of clinical observation (anamnesis and physical exam) laboratory abnormality (eg, blood glucose, blood count), disease (for example, liver, cardiovascular system, lung) or therapy that, in opinion of the investigator, may endanger the patient or interfere with the endpoints of study.