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Obesity Management Meds

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Weighing the effectiveness of drugs in managing obesity.

First, What is Type 2 Diabetes Mellitus, (in this case in kids)?

Patients with type 2 diabetes are a distinct group, having certain clinical features.  (Cross reference the Treatment Options for Type 2 Diabetes in Adolescents and Youth [TODAY] cohort of adolescents with type 2 diabetes.)"First, type 2 diabetes occurs almost exclusively in obese children and adolescents; the average BMI of patients with type 2 diabetes ranges from 35 to 39 kg/m2, one-third have a BMI greater than 40 kg/m2  Furthermore, at the time of diagnosis, pediatric patients are in the midst of puberty. The mean age at presentation is 14 years, at Tanner stage 4 or 5. More than half of patients have an affected parent, and close to 90% have at least 1 first- or second-degree relative with type 2 diabetes.  Finally, adolescents with type 2 diabetes come predominately from single-parent families of low income and educational attainmment."

See: Obesity Drug Failure Leaves Fewer Options for Diabetics; A commentary on obesity pills—and the information gap in helping diabetics avoid health risks.  See also,

"Drugs to treat obesity can be divided into three groups: those that reduce food intake; those that alter metabolism; and those that increase thermogenesis. Monoamines acting on noradrenergic receptors, serotonin receptors, dopamine receptors, and histamine receptors can reduce food intake. A number of peptides also affect food intake. The noradrenergic drugs phentermine, diethylpropion, mazindol, benzphetamine, and phendimetrazine are approved only for short-term use. Sibutramine, a norepinephrine-serotonin reuptake inhibitor, is approved for long-term use. Orlistat inhibits pancreatic lipase and can block 30% of the triacylglycerol hydrolysis in subjects eating a 30% fat diet. The only thermogenic drug combination that has been tested is ephedrine and caffeine, but this treatment has not been approved by regulatory agencies. In clinical trials other drugs that may modulate peptide-feeding systems are being developed."

George A Bray, MD "A concise review on the therapeutics of obesity." Nutrition Oct. 2000;16(10):953-960


Weighing effectiveness versus risk in obesity drugs  Tuesday, December 14th, 2010

"In their quest to find drugs to curb obesity, scientists have had about as much success as long-term dieters who want to stay thin — which is to say, very little. In fact, the last year has been so bleak on the research front that some experts are questioning whether a long-desired safe and effective diet pill can be found.

Advisory panels for the Food and Drug Administration recommended against approval of two experimental weight-loss drugs this year — Lorqess in September and Qnexa in July — citing unacceptable risks for unimpressive benefits. Another drug, Meridia, was withdrawn from the market in October after it was linked to higher risks of heart attacks and strokes."  More

Comments

Luke:

Some claim appetite suppressants work long term - this is rather unlikely as you would probably guess - Everyone knows their dismal track record, by now. How about lap band operations? - No one should have that procedure unless fully committed to lifestyle management. Do drugs prevent the complications of obesity? Possibly, but that is missing the opportunity to address the original problem--obesity.

Case Study that supports my view:

PURPOSE: We performed a meta-analysis of randomized controlled trials to assess the effect of metformin on metabolic parameters and the incidence of new-onset diabetes in persons at risk for diabetes.

METHODS: We performed comprehensive English- and non-English-language searches of EMBASE, MEDLINE, and CINAHL databases from 1966 to November of 2006 and scanned selected references. We included randomized trials of at least 8 weeks duration that compared metformin with placebo or no treatment in persons without diabetes and evaluated body mass index, fasting glucose, fasting insulin, calculated insulin resistance, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, triglycerides, and the incidence of new-onset diabetes.

RESULTS: Pooled results of 31 trials with 4570 participants followed for 8267 patient-years showed that metformin reduced body mass index (-5.3%, 95% confidence interval [CI], -6.7–4.0), fasting glucose (-4.5%, CI, -6.0–3.0), fasting insulin (-14.4%, CI, -19.9–8.9), calculated insulin resistance (-22.6%, CI, -27.3–18.0), triglycerides (-5.3%, CI, -10.5–0.03), and low-density lipoprotein cholesterol (-5.6%, CI, -8.3–3.0%), and increased high-density lipoprotein cholesterol (5.0%, CI, 1.6-8.3) compared with placebo or no treatment. The incidence of new-onset diabetes was reduced by 40% (odds ratio 0.6; CI, 0.5-0.8), with an absolute risk reduction of 6% (CI, 4-8) during a mean trial duration of 1.8 years.

CONCLUSION: Metformin treatment in persons at risk for diabetes improves weight, lipid profiles, and insulin resistance, and reduces new-onset diabetes by 40%. The long-term effect on morbidity and mortality should be assessed in future trials.

DISCUSSION

The primary results of an important medication study:

[F]irst, that metformin monotherapy provided durable glycemic control in only half the participants; second, that the combination of metformin and rosiglitazone improved the durability of glycemic control; and third, that metformin combined with lifestyle intervention was no better than metformin alone in maintaining glycemic control. The differential effect among treatments did not appear to be due to differences in adherence and could not be explained by baseline characteristics, differential effects on BMI, or treatment-group differences in insulin secretion, insulin sensitivity, or body composition.

A Clinical Trial to Maintain Glycemic Control in Youth with Type 2 Diabetes  N Eng J Med 4/29/12 Accessed online 4/30/12

 

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