SAN DIEGO —
“There’s just not a lot [of information] about these patients,” Mark Burish, MD, PhD, associate professor of neurology at UT Houston, said in an interview. He presented the results of the survey at the annual meeting of the American Headache Society.
There have been some retrospective analyses of patient data, but that has a lot of potential for bias. “It’s only the patients who can afford to be there, and who needed those treatments, and so we want to do more of a general survey,” said Dr. Burish.
The results weren’t particularly surprising, and tended to reaffirm what was known anecdotally, including symptoms similar to those of migraine, but it gave some insight into treatments. “Some of the CGRP inhibitors and the onabotulinum toxin seem to be some of the more effective treatments, according to our survey, so those are probably worth looking into for these patients if you can get them approved by insurance, and if you can get patients to accept the idea they might have to give themselves an injection of some sort,” said Dr. Burish.
Despite having some promise, there was variation among CGRP inhibitors. Eptinezumab, rimegepant, and atogepant were commonly reported as effective, but others, such as erenumab and galcanezumab, were less often reported. “None of them were incredibly effective. These were just the best things we have at this time,” said Dr. Burish.
Additional Information on a Rare, Hard-to-Treat Condition
Jason Sico, MD, who moderated the session, was asked for comment. “I’m so appreciative that the team has looked at a new daily persistent headache. It’s a rare type of headache disorder. It’s also one that is notoriously difficult to treat and something that we that we really need to know more about. It is difficult to really get good, robust in-depth information on these patients, and the team did a really nice job with that,” said Dr. Sico, associate professor of neurology and internal medicine at Yale School of Medicine and national director of the Headache Centers of Excellence Program within the Veterans Health Administration.
He noted that the researchers found that opioids were the most commonly used acute treatment. That’s not surprising, but “it would be interesting to see what was tried before someone had gotten to opioids,” he said.
The findings also gave some unexpected insight into the condition. “I really found it striking that an overwhelming majority of patients reported brain fog. Given the context that it is daily persistent headache, one could surmise that they have brain fog a lot of the time,” said Dr. Sico.
‘A Good Data Set’
The researchers analyzed data from 337 international patients who responded to a survey. They also randomly selected 34 patients for an interview, and 32 of those were deemed likely to have NDPH. “So we really spent some effort making sure this was a good data set,” said Dr. Burish. The participant population was 72% female, 83.7% White, and 70.7% were based in the United States, though other countries included Canada, the United Kingdom, Australia, Ireland, Germany, Sweden, and Switzerland. The mean age was 41.2 years. The peak ages of onset were between 11 and 40 years, though there were a few cases in the 0-5 age range and over 70. Possible triggers that occurred in the 3 months before onset included psychological stressors (34%), infection or inflammation (32%, COVID infection (5%), injury or surgery (8%), or a change in medications (4%). No clear trigger was identified by 22% of respondents.
The survey included information on associated features, and frequently reported issues included brain fog (approximate 75%), sound sensitivity (about 62%), light sensitivity (57%), nausea (39%), smell sensitivity (32%), visual disturbances (28%), vomiting (13%), and chills (9%).
Insights Into Treatment Efficacy
Dr. Burish showed a slide of responses to questions about acute treatments that respondents had tried at least once and viewed as ‘completely effective,’ ‘mostly effective,’ or ‘somewhat effective.’
“No medicine was completely effective, which I think a lot of people know from NDPH. It is notoriously difficult to treat. The things on the top of the list are mostly opioids. There’s one (non-opioid), the DHE (dihydroergotamine) injection. All the way on the other side, you have diphenhydramine. The NSAIDs and triptans are mostly in the middle. We did ask about some of the wearable devices, and we had extra questions about, are you using it appropriately? Those are kind of in the middle or towards the bottom [in frequency],” said Dr. Burish.
There was a similar question regarding effective preventive medications that had been tried for at least 2 months or 3 months in the cause of onabotulinum toxin or CGRP medications. “This one had a little bit more of a pattern to it: A lot of the CGRP medications are up toward the top. It’s not perfect. Erenumab and galcanezumab are closer to the bottom, but it was interesting that a lot of the CGRP medicines were toward the top. Onabotulinum toxin was also somewhat toward the top. We looked at a few different anti-inflammatories. Methylprednisolone is kind of toward the upper half at least, whereas prednisone and montelukast are at the absolute bottom. And the prednisone is a pretty good dose, 50 milligrams or higher. There are some people thinking that this is an inflammation or infectious etiology, (but) it wasn’t that all of the anti-inflammatories were necessarily toward the top of the list,” said Dr. Burish.
Dr. Burish has received funding from Lundbeck. Dr. Sico has no relevant financial disclosures.