In the race to lose weight quickly, many people are turning to weight-loss medications promoted on social media and online ads. These medicines often show fast results, creating the belief that weight loss is permanent. However, when the medication is stopped, weight frequently comes back—sometimes even faster than before, leading to frustration and anxiety.

The truth is that weight loss achieved through medication alone is usually not sustainable. Without lifestyle changes, it can also pose health risks. Here’s why this happens and why depending only on medicines for weight loss can be dangerous.

Why does weight increase after stopping weight-loss medication?

According to Subhash Giri, Professor and Director of the Department of Medicine at Dr. Ram Manohar Lohia Hospital, weight-loss drugs work by temporarily altering the body’s natural mechanisms.

These medicines may:

• Suppress appetite

• Increase calorie expenditure

• Change digestion or absorption

When the medication is discontinued, the body gradually returns to its original state. Appetite often rebounds sharply, and the body—having experienced a period of low energy intake—tries to store more fat as a protective response. This leads to rapid weight gain.

If a person hasn’t built healthy habits like balanced eating and regular physical activity during the medication phase, the body loses its ability to regulate weight on its own. Old habits return, and so does the weight.

Why is weight loss based only on medication dangerous?

Depending solely on medicines for weight loss can negatively affect overall health. Such medications interfere with the body’s natural appetite and digestion, which may result in:

• Weakness and fatigue

• Loss of muscle mass along with fat

• Hormonal imbalances with long-term use

Another major issue is behavioral dependence. When weight loss is achieved without lifestyle changes, there’s no long-term system in place to maintain it. Once the medicine is stopped, weight regain is almost inevitable.

This is why experts say medication-only weight loss is neither safe nor sustainable without diet, exercise, and routine changes.

What should you do instead?

• Follow a balanced, nutritious diet

• Include regular exercise and physical activity

• Be patient—healthy weight loss takes time

• Use weight-loss medicines only under a doctor’s supervision

• Focus on long-term lifestyle changes, not quick fixes

Bottom line

Weight-loss medications may offer short-term results, but without healthy habits, the weight often returns—and with added health risks. Sustainable weight loss comes from consistency, lifestyle changes, and medical guidance, not from pills alone.