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Weight-loss injections like Semaglutide and Tirzepatide are transforming obesity treatment. An endocrinologist explains how these medications work
Wegovy contains semaglutide, a glucagon-like peptide naturally produced in the body. (AP/File)
Weight-loss injections have recently moved from specialist clinics into mainstream conversations about health and fitness. From social media discussions to celebrity endorsements, medications such as Semaglutide and Tirzepatide have sparked both curiosity and debate. While many people see them as the newest trend in weight management, medical experts emphasise that these drugs are part of a broader shift in how obesity is understood and treated.
For decades, weight loss has largely been framed as a matter of discipline: eat less, move more, and results will follow. But growing scientific research has revealed that obesity is far more complex than lifestyle choices alone. Hormones, genetics, metabolism, sleep patterns, and stress levels all influence how the body regulates appetite and stores fat.
Dr. Ravi Sankar Erukulapati, Senior Endocrinologist, Apollo Sugar Clinic, Jubilee Hills, Hyderabad, explains, “The growing interest in weight-loss injections tells us something important; that people are finally beginning to understand that obesity is not just about eating too much or exercising too little. As an endocrinologist, I see obesity for what it truly is: a chronic, relapsing medical condition influenced by hormones, brain appetite pathways, genetics, metabolism, sleep, stress, and environment. For many individuals, lifestyle measures alone are simply not enough, and that is not a failure of willpower.”
How Weight-Loss Injections Work
Modern weight-loss medications work by targeting the biological systems that control hunger and fullness. Rather than simply suppressing appetite in a temporary way, these drugs interact with hormonal pathways that regulate metabolism and satiety.
Dr. Erukulapati explains, “Newer medications such as Semaglutide and Tirzepatide work by acting on gut hormones and areas in the brain that regulate hunger and satiety. They help patients feel full earlier, reduce cravings, and improve metabolic health. When prescribed to the right patient, these drugs can produce meaningful weight loss and also improve diabetes control, blood pressure, cholesterol, fatty liver, and overall heart risk.”
These medications belong to a class of drugs known as GLP-1 receptor agonists and dual incretin therapies. By mimicking natural hormones released after eating, they help regulate appetite signals between the gut and the brain. As a result, patients often experience reduced hunger, improved portion control, and better blood sugar regulation.
Not a Quick Fix
Despite the growing popularity of these injections, specialists caution against viewing them as cosmetic solutions or shortcuts to rapid weight loss.
Dr. Erukulapati emphasises, “That said, these are not cosmetic drugs or ‘quick fixes.’ They are meant for people with obesity, or those who are overweight with medical complications such as diabetes or sleep apnea. A proper medical evaluation and close follow-up are very essential.”
Doctors typically recommend these medications for individuals with a body mass index (BMI) in the obesity range or for those who are overweight but also have associated medical conditions such as type 2 diabetes, hypertension, or obstructive sleep apnea. Careful screening ensures that the treatment is safe and appropriate for the individual.
Why Lifestyle Still Matters
Even with the benefits of medical therapy, sustainable weight management still relies on long-term lifestyle changes. Medication alone cannot address the broader behavioural and metabolic factors that influence weight.
As Dr. Erukulapati concurs, “Medication is one part of the solution and not the entire solution. Sustainable weight management still requires structured nutrition, physical activity, sleep optimisation, and behavioural change. Used responsibly under medical supervision, weight-loss medications can be powerful tools. But they work best as part of a comprehensive, long-term plan tailored to the individual.”
A Changing Approach to Obesity
The rising conversation around weight-loss injections reflects a broader transformation in how obesity is approached within medicine. Rather than blaming individuals for a lack of discipline, healthcare providers are increasingly recognising obesity as a complex, chronic disease that requires long-term medical management.
For many patients, the goal is not simply to lose weight quickly but to improve metabolic health, reduce disease risk, and build sustainable habits that support lifelong wellbeing. Weight-loss medications, when used appropriately and under medical supervision, may help bridge the gap between lifestyle changes and lasting health outcomes.
March 04, 2026, 11:46 IST
