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GREENLIGHT THERAPY IMPROVES MIGRAINES

 

GREENLIGHT THERAPY IMPROVES MIGRAINES






New research from the University of Arizona Health Sciences found that people who suffer from migraines may benefit from green light therapy, which was shown to reduce headaches and improve patient quality of life.

According to the Migraine Research Foundation, migraine is the third most prevalent illness globally, affecting 39 million people in the United States and 1 billion worldwide.

"This is the first clinical study to evaluate green light exposure as a potential preventive therapy for patients with migraine, " said Mohab Ibrahim, MD, Ph.D., lead author of the study, an associate professor in the Arizona College of Medicine -- Tucson's Department of Anesthesiology, Pharmacology, and Neurosurgery and director of the Chronic Pain Management Clinic. "As a physician, this is really exciting. Now I have another tool in my toolbox to treat one of the most difficult neurological conditions -- migraine."

Overall, green light exposure reduced the number of headache days per month by an average of about 60%. A majority of study participants -- 86% of episodic migraine patients and 63% of chronic migraine patients -- reported a more than 50% reduction in headache days per month. Episodic migraine is characterized by up to 14 headache days per month, while chronic migraine is 15 or more headaches per month.

"The overall average benefit was statistically significant. Most of the people were extremely happy," Dr. Ibrahim said of the participants, who were given light strips and instructions to follow while completing the study at home. "One of the ways we measured participant satisfaction was when we enrolled people, we told them they would have to return the light at the end of the study. But when it came to the end of the study, we offered them the option to keep the light, and 28 out of the 29 decided to keep the light."

Dr. Ibrahim and co-author Amol Patwardhan, MD, Ph.D., affiliated with the Arizona Health Sciences Comprehensive Pain and Addiction Center, have been studying the effects of green light exposure for several years. This initial clinical study included 29 people, all of whom experienced episodic or chronic migraine and failed multiple traditional therapies, such as oral medications and Botox injections.

"Despite recent advances, the treatment of migraine headaches is still a challenge," said Dr. Patwardhan, an associate professor and the vice-chair of research in the Department of Anesthesiology. "The use of a nonpharmacological therapy such as green light can be of tremendous help to a variety of patients that either does not want to be on medications or do not respond to them. The beauty of this approach is the lack of associated side effects. If at all, it appears to improve sleep and other quality of life measures."

During the study, patients were exposed to white light for one to two hours a day for 10 weeks. After a two-week break, they were exposed to a green light for 10 weeks. They completed regular surveys and questionnaires to track the number of headaches they experienced and the intensity of those headaches, and quality of life measurements such as falling and staying asleep or performing work.

Using a numeric pain scale of 0 to 10, participants noted that green light exposure resulted in a 60% reduction in pain, from 8 to 3.2. Greenlight therapy also shortened the duration of headaches, and it improved participants' ability to fall and stay asleep, perform chores, exercise, and work.

None of the study participants reported any side effects of green light exposure.

"In this trial, we treated green light as a drug," Dr. Ibrahim said. "It's not any green light. It has to be the right intensity, the right frequency, the right exposure time, and the right exposure methods. Just like with medications, there is a sweet spot with light."

Dr. Ibrahim has been contacted by physicians from as far away as Europe, Africa, and Asia, all asking for the green light parameters and schematic design for their own patients.

"As you can imagine, LED light is cheap," he said. "Especially in places where resources are not that available, and people have to think twice before they spend their money, when you offer something affordable, it's a good option to try."

The paper, "Evaluation of green light exposure on headache frequency and quality of life in migraine patients: A preliminary one-way cross-over clinical trial," was published online by Cephalalgia, the journal of the International Headache Society.

"These are great findings, but this is where the story begins," Dr. Ibrahim said. "As a scientist, I am really interested in how this works because if I understand the mechanism, then I can utilize it for other conditions. I can use it as a tool to manipulate the biological systems to achieve as much as we can."


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