Can Anti-Obesity Medications Help People With Knee Or Hip Osteoarthritis

Anti-obesity medications may help some people with overweight or obesity and knee or hip osteoarthritis by supporting weight loss, which reduces strain on weight-bearing joints and may improve mobility. A study of 6,524 adults associated slow-to-moderate medication-related weight loss with lower five-year mortality, but its observational design cannot prove that the medicines or weight-loss rate caused the outcome.  

Can Anti-Obesity Medications Help People With Knee Or Hip Osteoarthritis
Medically reviewed

Dr. Chrysoula I. Liakou MD, PhD Google Scholar LinkedIn

Internal Medicine Specialist
Cancer Immunology Researcher

What Research Shows About Weight-Loss Medicines, Osteoarthritis Symptoms and Long-Term Health

  • Researchers have found that drugs leading to gradual and moderate weight reduction could boost the life expectancy of individuals with obesity-related knee or hip osteoarthritis.

  • Conversely, medications causing swift weight loss might heighten the risk of early mortality in those with these ailments.

  • Specialists highlight that contemporary anti-obesity medications function distinctively compared to their predecessors.

  • They emphasize that incorporating dietary and exercise routines is crucial when utilizing weight loss medications.


Losing weight quickly with the help of anti-obesity drugs may not be the best idea for people dealing with knee or hip osteoarthritis and weight issues, according to a recent study in the journal Arthritis & Rheumatology.


The study suggests that if you're overweight and have knee or hip osteoarthritis, it's better to opt for weight loss medications that help you lose weight slowly and moderately rather than ones that make you lose weight rapidly.


The study looked at data from 6,524 people with knee or hip osteoarthritis who were taking weight loss drugs like orlistat, sibutramine, or rimonabant.


The findings revealed that over five years, the group that experienced weight gain or maintained their weight had a 5.3% death rate, whereas the group with slow-to-moderate weight loss had a 4% death rate. In contrast, the fast weight loss group had a 5.4% death rate.


Comparatively, the risk of death was 28% lower in the slow-to-moderate weight loss group when compared to the weight gain/stable group, whereas the fast weight loss group showed only a 1% lower risk.


In summary, the study suggests that a gradual and moderate approach to weight loss through the use of anti-obesity medications may reduce the risk of premature death in individuals who are overweight or obese and also suffer from knee or hip osteoarthritis.

 

Why Losing Weight Quickly Isn’t Necessarily Effective


Weight loss medications vary in effectiveness and the speed at which they lead to weight loss. Specialists typically do not categorize these medications solely based on how quickly a person sheds pounds.


The response to weight loss medications can vary significantly from one individual to another. Some of the most effective weight loss medications currently available work by mimicking certain hormones that increase feelings of fullness and slow down stomach emptying. This mechanism can lead to a more rapid weight loss. On the other hand, older medications that are less effective often result in slower weight loss.


Several factors influence how fast someone loses weight when taking these medications. These factors include age, gender, activity level, underlying medical conditions, and importantly, dietary choices. The type of foods consumed can have a significant impact on the rate of weight loss.


Newer weight loss medications differ from older ones in their mechanism of action. The medical distinction lies in how these drugs target hormones more directly, which can contribute to faster weight loss compared to medications with different mechanisms.



A Close Look At Weight Loss Medications


Weight loss medications can be adjusted to help you lose weight more slowly, which is usually better for keeping the weight off in the long run. This is especially true if you're changing your diet and exercise habits. While it might mean losing weight gradually, it's safer and more sustainable. On the other hand, some medications can make you lose weight quickly, but they also come with more side effects and risks.


Researchers have found a connection between how fast you lose weight and your chances of health problems, but they're still determining why this happens. It could be because of the specific medications used and their side effects. Another possibility is that losing weight too quickly can lead to other health issues.


Different weight loss drugs work in different ways. Some make you less hungry or speed up your metabolism, leading to faster weight loss. Others affect your cravings and the pleasure you get from eating certain foods. The choice of medication should be based on what's best for your specific weight loss needs. If you're thinking about using weight loss medications, it's essential to talk to your doctor to find the right one for you and understand any potential side effects.

 

Weight Loss And Addiction


Some weight loss drugs impact the brain's pleasure centre, which can be beneficial for people dealing with addiction issues. For instance, medications like Ozempic and Wegovy, both containing the active ingredient semaglutide, may influence a person's desire to consume alcohol by reducing the release of dopamine in response to addictive behaviours. Dopamine is a chemical in the brain associated with pleasure and is released during activities like eating.


It's important to note that even with the availability of weight loss medications, healthcare professionals often recommend therapeutic lifestyle changes as part of the weight loss process. These changes include improving dietary choices, reducing calorie intake by eating healthier foods and exercising regularly. However, adherence to these lifestyle changes can be challenging. Slower and more sustainable weight-loss approaches are more beneficial in the long run.


Lifestyle modifications serve as the foundation for successful weight loss and are typically the most effective. It can take up to two months for a new behaviour to become a habit, and rapid weight loss is often unsuccessful, with the potential for quick weight regains and additional pounds.


While the study results are promising, further research is needed to understand these dynamics fully. Nonetheless, focusing on long-term, gradual changes in behaviour for weight loss makes sense.


You can seek consultation with Mobi Doctor for medical advice and guidance.



Anti-Obesity Medicines, Weight Loss and Osteoarthritis FAQs

Anti-obesity medications can support weight loss, reducing the mechanical load placed on the knees and hips during walking and everyday movement. This may improve pain, physical function and mobility in people with overweight or obesity. These medicines do not rebuild damaged cartilage or cure osteoarthritis, so they should form part of a broader management plan.

The study associated slow-to-moderate weight loss with a lower five-year mortality rate among people taking anti-obesity medication. Mortality was 4.0% among those losing 2%–10% of their weight, compared with 5.3% among those whose weight remained stable or increased. This was an association from observational data, not proof of a direct protective effect.

No, the study does not prove that rapid weight loss causes harm or premature death. Participants losing at least 10% of their weight within one year did not show the mortality reduction observed in the slow-to-moderate group, but illness, frailty, medication differences or other unmeasured factors could have influenced the results. Rapid weight loss therefore requires individual clinical interpretation.

The main analysis involved people starting orlistat, sibutramine or rimonabant, meaning much of the evidence relates to older weight-loss medicines. A sensitivity analysis that included GLP-1 receptor agonists produced broadly similar findings, but the research was not designed to compare individual drugs. Its results cannot identify which modern medication is best for osteoarthritis.

Semaglutide has reduced knee pain in research involving people with obesity and moderate-to-severe knee osteoarthritis. In a 68-week randomised trial, weekly semaglutide 2.4 mg produced greater weight loss and pain improvement than placebo alongside lifestyle support. The study concerned knee rather than hip osteoarthritis, and the treatment is not appropriate for every patient.

Any sustainable weight reduction may benefit joint pain and function, although greater reductions can provide more noticeable improvement. NICE advises that losing 10% of body weight is likely to provide more benefit than losing 5% for people with osteoarthritis and overweight or obesity. The appropriate target should account for general health, nutrition, mobility and muscle preservation.

No, medication should complement rather than replace nutritional support and therapeutic exercise. Strengthening and aerobic activity help maintain muscle, mobility and joint function, while dietary changes support sustainable weight management. Exercise may need to be adapted around pain or physical limitations, but complete inactivity can worsen stiffness, weakness and confidence in movement.

Anti-obesity medicines are not suitable for everyone with knee or hip osteoarthritis. Treatment eligibility depends on weight-management criteria, previous attempts to lose weight, medical conditions, current medication and the risks of the specific drug. Osteoarthritis alone does not establish eligibility, and treatment should be selected according to the person’s wider health and long-term weight-management needs.

Urgent assessment is needed for a suddenly hot, red or severely swollen joint, fever, inability to bear weight, major deformity or intense pain following an injury. These symptoms could indicate joint infection, fracture or another condition rather than uncomplicated osteoarthritis. Rapid deterioration or a sudden major loss of movement also warrants prompt medical evaluation.


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