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Drug Dosing: Obese Patients01:21

Drug Dosing: Obese Patients

In the United States, obesity is a prominent concern. It is linked to heightened mortality rates due to increased occurrences of conditions such as hypertension, atherosclerosis, coronary artery disease, and diabetes compared to nonobese individuals. A patient is classified as obese if their actual body weight surpasses the ideal or desirable body weight by 20%, based on Metropolitan Life Insurance Company data. Ideal body weights consider average weights and heights for males and females...
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Obesity significantly alters the pharmacokinetic processes of drug absorption and distribution, presenting unique challenges in medical treatment. The increased fat tissue and decreased lean muscle in obese individuals can significantly affect how drugs are absorbed into the body and distributed across different tissues. This alteration can lead to variances in the effectiveness and safety of medications, necessitating adjustments in dosing or drug selection for obese patients.One notable...
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The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in adipocytes...
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Bulimia nervosa is a complex and severe eating disorder characterized by a cyclical pattern of binge-and-purge eating pattern. It generally involves an episode of binge eating, followed by compensatory behaviors such as vomiting, excessive exercise, laxative use, or fasting, to prevent weight gain. Despite often maintaining a normal weight, individuals with bulimia are intensely preoccupied with their body image and harbor an overwhelming fear of gaining weight. This can contribute to the...
Pharmacokinetics in Obese Patients: Drug Metabolism and Excretion01:20

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Drug metabolism, a critical process in the liver, involves two primary phases: Phase I reactions and Phase II conjugation. Obesity introduces significant alterations in this metabolic process, primarily due to fatty infiltration of the liver, leading to conditions such as nonalcoholic fatty liver disease (NAFLD). This condition can modify the activities of both Phase I and II enzymes, impacting how drugs are metabolized in obese patients.Phase I metabolism sees variable effects across...

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Related Experiment Video

Updated: May 19, 2026

Techniques of Sleeve Gastrectomy and Modified Roux-en-Y Gastric Bypass in Mice
10:05

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Published on: March 20, 2017

Pitfalls in using BMI as a selection criterion for bariatric surgery.

Edward H Livingston1

  • 1UT Southwestern School of Medicine, Chicago, Illinois, USA. edward.livingston@jamanetwork.org

Current Opinion in Endocrinology, Diabetes, and Obesity
|August 28, 2012
PubMed
Summary

Body Mass Index (BMI) is a poor predictor of mortality and should not determine bariatric surgery eligibility. Instead, focus on obesity complications like diabetes for patient selection.

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Area of Science:

  • Metabolic Health
  • Obesity Medicine
  • Surgical Outcomes

Background:

  • Obesity is a significant health concern linked to various comorbidities.
  • Historically, Body Mass Index (BMI) has been the primary criterion for bariatric surgery eligibility.
  • Emerging evidence questions the reliability of BMI as an independent predictor of mortality.

Purpose of the Study:

  • To re-evaluate the role of BMI in bariatric surgery selection.
  • To explore alternative criteria for identifying suitable candidates for bariatric procedures.
  • To assess the impact of fat distribution versus BMI on health outcomes.

Main Methods:

  • Review of longevity studies in patients who underwent bariatric surgery.
  • Analysis of the correlation between fat distribution and obesity-related complications.
  • Examination of the relationship between weight loss and improvements in metabolic conditions.

Main Results:

  • Longevity studies show minimal to no survival improvement post-bariatric surgery.
  • Fat distribution is a stronger predictor of obesity complications than overall BMI.
  • Weight loss effectively treats obesity-related diabetes, regardless of the method.

Conclusions:

  • BMI is an inadequate sole criterion for bariatric surgery approval.
  • Patient selection should prioritize obesity complications amenable to weight loss, such as diabetes.
  • Rethinking BMI's role in bariatric surgery guidelines is necessary for improved patient care.