Can My Dr Prescribe Diet Pills

The woman sat on my exam table and pointed to her snug paper gown. "Doctor," she said, "I need your help losing weight."

I spent the next several minutes speaking with her about diet and exercise, the health risks of obesity, and the benefits of weight loss—a talk I've been having with my patients for more than twenty years. But, like the majority of Americans, most of my patients remain overweight.

Afterward, I realized that what my patient wanted was a pill that would make her lose weight. I could have prescribed her one of four drugs currently approved by the F.D.A.: two, phentermine and orlistat, that have been around for more than a decade, and two others, Belviq (lorcaserin) and Qsymia (a combination of phentermine and topiramate), that have recently come onto the market and are the first ever approved for long-term use. (Ian Parker wrote about the F.D.A.'s approval process for new medications in this week's issue.) The drugs work by suppressing appetite, by increasing metabolism, and by other mechanisms that are not yet fully understood. These new drugs, along with beloranib—which produces more dramatic weight loss than anything currently available but is still undergoing clinical trials—were discussed with great excitement last month by experts and researchers at the international Obesity Week conference in Atlanta.

But I've never prescribed diet drugs, and few doctors in my primary-care practice have, either. Donna Ryan, an obesity specialist at the Pennington Biomedical Research Center at Louisiana State University, has found that only a small percentage of the doctors she has surveyed regularly prescribe any of the drugs currently approved by the F.D.A. Sales figures indicate that physicians haven't embraced the new medications, Qsymia and Belviq, either.

The inauspicious history of diet drugs no doubt contributes to doctors' reluctance to prescribe them. In the nineteen-forties, when doctors began prescribing amphetamines for weight loss, rates of addiction soared. Then, in the nineties, fen-phen, a popular combination of fenfluramine and phentermine, was pulled from the market when patients developed serious heart defects. Current medications are much safer, but they produce only modest weight loss, in the range of about five to ten per cent, and they do have side effects.

Still, as Ryan pointed out, doctors aren't always shy about prescribing medications that cause side effects and yield undramatic results. A five to ten per cent weight loss might not thrill patients, or even nudge them out of being overweight or obese, but it can improve diabetes control, blood pressure, cholesterol, sleep apnea, and other complications of obesity. And, although the drugs aren't covered by Medicare or most states' Medicaid programs, private insurance coverage of weight-loss drugs has improved and is likely to expand further under the Affordable Care Act, which requires insurers to pay for obesity treatment. So what prevents physicians from prescribing these drugs?

Several leading experts and researchers attending Obesity Week told me that the problem is that, while specialists who study obesity view it as a chronic but treatable disease, primary-care physicians are not fully convinced that they should be treating obesity at all. Even though physicians since Hippocrates have known that excess body fat can cause diseases, the American Medical Association announced that it would recognize obesity itself as a disease only a few months ago. These divergent views on obesity represent one of the widest gulfs of understanding between generalists and specialists in all of medicine.

Lee M. Kaplan, co-director of the Weight Center at Massachusetts General Hospital, thinks that some bias comes from the average physician's lack of appreciation for the complex physiology of weight homeostasis. Humans have evolved to avoid starvation rather than obesity, and we defend our body mass through an elaborate system involving the brain, the gut, fat cells, and a network of hormones and neurotransmitters, only a fraction of which have been identified. Obesity, Kaplan said, which represents dysfunction of this system, is likely not one disease but dozens.

That one person's obesity is not like another's may explain why some people lose a lot of weight with surgery, or a particular diet or drug, and some don't. Kaplan thinks that if more doctors understood this, they'd view obesity treatment more receptively and realistically. He said, "If I were to say to you, 'I have this drug that treats cancer,' and you asked me, 'What kind of cancer?,' and I said, 'All cancers,' you'd laugh, because you recognize intuitively that cancer is a heterogeneous group of disorders. We're going to look back on obesity one day and say the same thing."

Obesity is potentially, in part, a neurological disease. Jeffrey Flier, an endocrinologist and dean of Harvard Medical School, has shown, like others, that repeatedly eating more calories than you burn can damage the hypothalamus, an area of the brain involved in eating and satiety. In other words, Big Gulps, Cinnabons, and Whoppers have altered our brains such that many people—particularly those with a genetic predisposition to obesity—find fattening foods all but impossible to resist once they've eaten enough of them. Louis J. Aronne, director of the Comprehensive Weight Control Program at New York-Presbyterian/Weill Cornell Medical Center, explained to me, "With so much calorie-dense food available, the hypothalamic neurons get overloaded and the brain can't tell how much body fat is already stored. The response is to try to store more fat. So there's very strong scientific evidence that obesity is not about people lacking willpower."

Can My Dr Prescribe Diet Pills

Source: https://www.newyorker.com/tech/annals-of-technology/diet-drugs-work-why-wont-doctors-prescribe-them

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