BP Med Can Prevent Migraines
Candesartan, a medication used to treat high blood pressure, is just as effective as more the commonly prescribed propranolol when it comes to preventing migraine attacks. That is the finding of a study from St. Olavs Hospital in Trondheim, Norway and the Norwegian University of Science and Technology Better yet, the team learned that candesartan may work for patients who get no relief from propranolol.
A release from the university quotes lead researcher Professor Lars Jacob Stovner as saying, "This gives doctors more possibilities and we can help more people."
The current study is a follow-up on a ten-year-old study from NTNU.Candesartan is already in use by several doctors as a migraine prophylactic, but the NTNU follow-up study, which confirms the study from a decade ago, provides the proof that the drug actually works. However, side effects may vary from person to person.
More than 20 percent of migraine patients report that they feel better even when they are given a placebo. But blind tests show that candesartan works preventively for another 20 to 30 percent of patients. The hope is now that candesartan will be even more commonly prescribed.
The release notes that migraines are thought to affect a staggering one billion people worldwide. This poses problems for the sufferers, but the problem is also costly for society because of sick leave and the reduced ability to work. Preventing migraines thus offers many benefits.
The NTNU study was a triple blind test, which means that neither patients nor doctors nor those who analyzed the results knew whether the patients had been given placebo or real medicine, Stovner said.
The researchers tested both candesartan and propranolol. In all, 72 patients took part of the study this time, the same number as ten years ago. These patients were normally affected by migraine attacks at least twice every month. The patients used each treatment (candesartan, propranolol or placebo) for 12 weeks, and also underwent four weeks before the start and between the treatment periods without any medication at all. Every patient was part of the study for almost a year.
Candesartan was originally a medication used to treat high blood pressure, but Harald Schrader, a retired professor from St. Olavs Hospital in Trondheim, who himself had both high blood pressure and migraine, discovered by chance in the 1990s that candesartan also worked well for his own headaches.
This finding led to the subsequent studies of the drug. The studies received partial support from AstraZeneca, but the research was conducted independent of the drug manufacturer. Lars Jacob Stovner and Erling Tronvik, a postdoc, have been among the most active in the research.
Candesartan is today marketed under the name Atacand, while propranolol is marketed under the name Inderal. But there are also several copies on the market.
"The patent is running out," Stovner says.
This also means that more patients will have access to cheaper, generic forms of the medicine. Candesartan will now very likely be part of the guidelines for the prophylactic treatment of migraine the world over.