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THURSDAY, May 24, 2018 (HealthDay News) -- If you're taking an antidepressant, you're likely to gain weight, a new study out of Britain reports.
That's a finding that generated little surprise among mental health experts.
"Psychiatrists have known about it, written about it and heard their patients talk about it for decades," said Dr. Brian Keefe, a psychiatrist and medical director at Zucker Hillside Hospital in Glen Oaks, N.Y. He was not involved with the new research.
In the study, patients who used any of a dozen common antidepressants were 21 percent more likely than others to put on an extra 5 to 8 pounds, the study authors said.
"It's important to stress that no patients should stop taking their medication and if they have any concerns, they should speak to their doctor or pharmacist," said Dr. Rafael Gafoor, a psychiatrist at King's College London who led the study.
He noted that the increased risk of weight gain peaked at two to three years of continuous use and lasted up to six years. Gafoor said researchers aren't sure why the added pounds didn't show up sooner.
One U.S. expert said his patients have experienced various outcomes with antidepressants.
"What I've seen is that some patients don't gain weight, some gain a lot of weight, and some lose weight," said Dr. Jamie Kane, director of the Northwell Health Center for Weight Management at Syosset Hospital, N.Y.
Alternatives are available for those who don't do well on antidepressants. These include talk therapy and increased exercise, Kane said.
For the study, Gafoor's team collected data on nearly 300,000 men and women between 2004 and 2014. About 20 percent of them were taking antidepressants.
The researchers noted any weight gain of at least 5 percent.
For every 100 people using antidepressants, 11 people a year gained weight, the study found. That compared to 8 per 100 of those not on the medications.
During the second and third years of taking antidepressants, a patient's risk of a 5 percent weight gain was about 46 percent higher than that of nonusers, researchers found.
As with all medical treatments, patients and their doctors must weigh the benefits of antidepressants against potential drawbacks, Keefe said.
"Untreated depression is almost always associated with misery and distress for patients, and can lead to disability and even suicide," he said. "Finding an antidepressant that actually relieves previously persistent sadness or anxiety is often the first priority for people who suffer from this illness."
The report was published May 23 in the journal BMJ.
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