Published on July 13, 2009 in THE PHILADELPHIA INQUIRER.
An aid in cases of hair pulling
A common dietary supplement containing an amino acid may help people with trichotillomania, also known as compulsive hair pulling, according to a study by researchers at the University of Minnesota School of Medicine in Minneapolis.
The amino acid N-acetylcysteine occurs naturally in the body and is sold in pill form in health-food stores.
Two to four percent of the U.S. population suffer from trichotillomania, a physically, emotionally and socially damaging condition that often coexists with other psychological disorders.
Fifty sufferers - 45 women and five men, with an average age of 34 - were randomly assigned to take 1,200 milligrams to 2,400 milligrams of N-acetylcysteine or a placebo for 12 weeks. Most were also receiving psychotherapy or psychotropic drugs.
After nine weeks, more than half of the supplement-takers reported improvement - such as reduced hair-pulling urges and fewer hair-pulling episodes - compared with 16 percent of those on the dummy pills. The positive response continued for the remaining three weeks.
The study is reported in the July issue of Archives of General Psychiatry.
- Heather J. Chin
A drug called Xenazine (tetrabenazine) has been approved by the U.S. Food and Drug Administration as the first treatment for chorea, the involuntary jerking movements that are a symptom of Huntington's Disease.
The drug addresses only specific symptoms, however, and does not target the complete condition. It is also not without major side effects, notes the FDA, such as suicidal thoughts and depression, especially in patients already predisposed to those conditions. Other side effects include drowsiness, insomnia, nausea and restlessness.
Xenazine works by suppressing the ability of dopamine - a neurotransmitter responsible for improving nerve conduction - to communicate with certain nerve cells in the brain, resulting in an over-active system.
Huntington's Disease, or chorea major, is a rare inherited neurological disorder that affects physical, cognitive and behavioral ability - a person's coordination, speech, thought processes and muscle control. Patients with chorea are at higher risk of fall-related injuries.
About 30,000 Americans are currently affected and another 200,000 are at risk of developing the genetic disorder. Symptoms usually manifest between the ages of 30 and 50.
Xenazine should be available by prescription by the end of the year and given the FDA-approval, it is likely (although uncertain) that Medicare and other government or private insurance plans would cover the drug's cost.
The medication is already available in Australia, Canada and Europe and is manufactured by the Washington, D.C.-based Prestwick Pharmaceuticals.
Heather J. Chin can be reached at hchin@thebulletin.us.