Weight-Loss Injections Are Not a Quick Fix: The Hidden Risks of GLP-1 Drugs

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An injection, a smaller appetite and a weighing scale that finally moves in the right direction. For many people living with obesity, GLP-1 weight-loss drugs deliver all three, and their popularity has grown fast.

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But the scale does not tell the whole story, especially when the medicine is taken without a proper assessment, a safe dose or a plan for what happens after it stops. That gap is where avoidable risks begin.

We spoke to Dr Ashish Gautam, Principal Director, Robotic and Laparoscopic Surgery, Max Super Speciality Hospital, Patparganj, New Delhi, who explained where these drugs help, where they can harm, and why long-term care matters more than kilograms lost.

Obesity Is a Chronic Disease, Not a Quick Fix

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"Weight-loss drugs have changed the treatment of obesity. They help reduce appetite, improve blood sugar control and support significant weight loss. But the increasing popularity has also meant people using them without the proper medical assessment or follow up. For others, these drugs are a quick fix for weight loss, forgetting that obesity is a chronic disease that requires chronic management," explained Dr Gautam.

The concern is not the medicines themselves. It is their use without understanding the patient's medical history, the risks involved or what happens when treatment stops."

Why Weight Loss Should Be Medically Supervised

Obesity reaches well beyond body weight. "Obesity affects several systems of the body. Type 2 diabetes, high blood pressure, obstructive sleep apnoea, fatty liver disease and joint problems become more common as weight increases. Treatment must address these conditions alongside weight loss. A reduction on the weighing scale alone does not establish whether a patient's health has improved," said Dr Gautam.

Weight loss should be medically supervised.

Nutrition, Muscle and Side Effects

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On what the drugs do to eating and the body, he says:

"GLP-1 drugs reduce your appetite and make you fuller more quickly with less food. If food intake is severely restricted, patients may have trouble getting enough protein, vitamins and minerals. Rapid weight loss can also lead to the loss of lean muscle, affecting strength, mobility and physical function."

He also lists the side effects patients should know about.

Common side effects include nausea, vomiting, diarrhoea and constipation. Persistent vomiting or diarrhoea can cause dehydration and, in some cases, kidney complications. Gallbladder problems are another recognised risk. Severe or persistent abdominal pain requires prompt medical assessment.

The Dangers of Using These Drugs Without Supervision

"Risks increase when people obtain medicines without a prescription, use another person's medication or increase their dose without medical advice. Serious dosing errors can also occur with injections where patients have to measure their own dose. Products purchased from unverified online sources may have uncertain quality, contents or storage conditions," warned Dr Gautam.

Medical supervision helps to identify if treatment is indicated, what dosage is appropriate and how the patient should be monitored. People taking medicines for diabetes may also need adjustments to their existing treatment to reduce the risk of low blood sugar.

What Happens When Treatment Stops?

Weight regain is a central concern, according to Dr Gautam.

"One important concern is weight regain after medication is discontinued. The drugs help control appetite while they are being used. Once their effects wear off, hunger can return, making it harder for some patients to maintain their weight loss."

In the trial extension, the STEP 1 trial, participants regained two-thirds of their weight loss during the year after stopping treatment. Individual outcomes vary, but the findings highlight the need to plan for long-term weight management before starting medication.

Counselling, he adds, has to run alongside treatment.

Patients should be counselled on nutrition, physical activity and muscle preservation during treatment. Strength training and sufficient protein intake should accompany weight loss to help preserve muscle mass. These measures remain relevant whether weight loss is achieved through medication, surgery or lifestyle changes.

When Bariatric Surgery Becomes an Option

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Dr Gautam explains who may be considered for surgery:

"Bariatric surgery offers another treatment option, particularly for people with severe obesity and associated medical conditions. For people in South East Asia, surgery may be considered at a BMI of 29 or higher when conditions such as type 2 diabetes, obstructive sleep apnoea, osteoarthritis or fatty liver disease are also present. People with a BMI of 35 or higher may also be considered for surgery even without these conditions. The decision depends on how excess weight affects daily life, the long-term health risks and the response to previous treatment."

On how the operations work, he says:

"Sleeve gastrectomy and gastric bypass are operations that alter the digestive system and affect appetite, food intake and metabolism. These changes can improve blood sugar control as well as support weight loss. In some patients with type 2 diabetes, blood sugar improves within days of surgery, before substantial weight loss has occurred."

He points to long-term evidence as well.

"The ARMMS-T2D study, which followed patients for 12 years, found average weight loss of approximately 20% after bariatric surgery compared with about 8% with medical and lifestyle treatment. Diabetes control and remission were also better in the surgical group."

The Role of Minimally Invasive and Robotic Surgery

Bariatric surgery is now commonly performed using laparoscopic or robotic techniques. The value of these approaches lies in minimally invasive access. Traditional open surgery requires a larger incision to allow access to the surgical site, while laparoscopic and robotic surgeries involve smaller incisions.

"Depending on the procedure and the patient's condition, minimally invasive surgery may result in less postoperative pain, decreased blood loss, shorter hospitalisation, and earlier return to normal activities," added Dr Gautam.

Robotic surgery does not ensure the same recovery for each patient. The result depends on the complexity of the disease, the operation, the general condition of the patient and the experience of the surgical team. The choice of technique must serve the patient's clinical needs rather than the technology alone.

Long-Term Care Still Matters

Surgery, he stresses, is only one part of treatment.

"Bariatric surgery alters the digestive system, but the surgery is just one part of treatment. Patients require regular follow up, attention to nutrition, adequate protein intake and physical activity. Depending on the procedure and individual nutritional requirements, vitamin and mineral supplements may be necessary. Blood tests help identify deficiencies and allow the treating team to address them early."

Weight-loss medication also has a role in obesity care. It may suit patients who do not require surgery, those preparing for an operation or selected patients who experience weight regain after surgery. Medication and surgery are not mutually exclusive options. The appropriate treatment depends on BMI, associated conditions, previous treatment and individual health goals.

Bottomline

Dr Gautam's closing message is about what success should look like.

The growing use of weight-loss drugs without medical supervision creates avoidable risks. Patients need an accurate assessment, appropriate dosing, nutritional guidance and a clear plan for maintaining their health if medication is stopped.

"Obesity treatment should be judged by more than kilograms lost. Improvement in blood sugar, blood pressure, sleep, mobility and overall health are equally important. The goal of treatment, whether it includes medication or bariatric surgery, is to reduce the medical complications of obesity and to sustain those improvements with appropriate treatment and long-term medical care," concluded Dr Gautam.

Disclaimer: The information provided in this article is for general informational and educational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or a qualified healthcare provider with any questions you may have regarding a medical condition.