Safety and Efficacy of Oral Idebenone for Preventive Treatment of Migraine in Adult Migraine Patients

Inclusion Criteria:

• Male or female participants ages 18 to 65 years;
• At least a 1-year history of migraine with or without aura is consistent with adiagnosis according to the ICHD-3;
• Migraine onset before age 50 years;
• History of 4 to 15 migraine attacks days per month in each of the 3 months prior tothe screening visit;
• The number of headache attacks <15 days/month during the 3 months prior to thescreening visit;
• Be willing to use effective contraception during the trial and for 28 days after theend of the last dose;
• Sign the informed consent form.
• History of 4 to 14 migraine attacks days within 4 weeks during the screening visit.
• The number of headache attacks <14 days/month within 4 weeks during the screeningvisit;
• Completed at least 23 days of the electronic diary within 28 days during the screeningvisit. And the participant is to be able to read, understand and complete the studyquestionnaire and headache diary;
• Understand and comply with the study procedures and methods, and voluntarilyparticipate in this study.

Exclusion Criteria:

• Participants diagnosed with probable migraine by ICHD-3
• Current or previous diagnosis of primary, secondary, or painful cranial neuropathyother than migraine (diagnostic criteria according to ICHD-3)
• Prior ineffectiveness after adequate treatment with more than 2 medications, which arelisted below: Divalproex, sodium valproate; topiramate; beta-blockers; Tricyclicantidepressants; serotonin-norepinephrine reuptake inhibitors; Flunarizine, Verapamil;Lisinopril, Candesartan. Definition of failure to treat: frequency, duration, and severity of headache 6 weeks afteradministration of the degree of the above drug does not decrease.
• Use of other devices or prohibited medications such as painkillers containing opioidsfor the treatment of migraine within 2 months before or during the screening visit
• Therapeutic injections of Botulinum toxin in the head, face, or neck within 4 monthsbefore screening and during the study periods
• Simultaneous use of 2 or more drugs within 2 months before or during the screeningvisit may be prophylactic Medications for migraine effects (if used only 1prophylactic drug, the dose must be stable for 2 months before the screening visit andthroughout the study period)
• The following situations occur within 2 months before the screening period begins:take ergotamines or triptans at least 10 days per month, or take non-steroidalanti-inflammatory drugs (NSAID) only every month ≥15 days, NSAID combination ≥10 days,or use opioid or barbiturate analgesics ≥4 days per month;
• Participants use the prohibited drugs such as painkillers containing opioids, devices,or regimens during treatment.
• History of active chronic pain syndrome (e.g., fibromyalgia, chronic pelvic pain, facePain, etc.);
• History of mental illness (e.g., schizophrenia or bipolar disorder) or Patient HealthQuestionnaire (PHQ-9) score ≥15. If the participant has a history of anxiety ordepression (PHQ-9 score < 15) and takes no more than one psychotropic drug, theparticipant will be allowed to enter. (participant must take a steady dose oftreatment within 3 months before the screening visit)
• Severe neurological disorders other than migraines (including febrile seizures);
• History of a malignant tumor within 5 years before the screening visit, except fornon-melanoma skin cancer, cervical or ductal carcinoma in situ;
• The screening visit meets any of the following laboratory test values: Alaninetransaminase (ALT) or aspartate aminotransferase(AST) >1.5×ULN, or total bilirubin >1.5×ULN (except for participants diagnosed with Gilbert syndrome);
• History of myocardial infarction, stroke, or transient ischemic attack, unstableangina or coronary bypass surgery within 12 months before the screening visit
• Expose participants to significant risk or confuse the study
• Based on clinical interviews or C-SSRS, the investigator believes that the subject hasself-harmed or harmed him Human risk;
• History of drugs or alcohol abuse within 12 months before the screening visit
• Pregnant, planning pregnancy, or Lactating women;
• Fertile female participants are unwilling to use an effective contraceptive during thestudy period Method. Infertile women as follows: history of menopause, age ≥ 55 years, menopause ≥12 months. Age < 55 years, free from spontaneous menstruation for at least 2 years. Age < 55, hasspontaneous menstruation in the past 1 year, but currently amenorrhea (e.g., Spontaneous orsecondary to hysterectomy), and postmenopausal gonadotropin levels gonadotropin Luteinizinghormone (LH), follicle-stimulating Hormone> 40 IU/L or postmenopausal estradiol level <5ng/dL History of bilateral oophorectomy, hysterectomy, or bilateral salpingectomy
• Participated in other clinical trials within the first 3 months
• Known allergy to Idebenone or any of its ingredients(e.g., lactose intolerant)；
• The participants are employees or immediate family members of the research center (parents, spouses, siblings, or children).