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A recent headline claims that Ozempic (semaglutide) and Mounjaro (tirzepatide) are a major breakthrough for treating obesity. In plain terms, the story is saying these two prescription drugs have changed how doctors think about helping people lose weight. The claim is broad, so it’s important to look at what the drugs are, what the evidence actually shows, and what it means for everyday people. Semaglutide and tirzepatide are medicines given by injection that act like hormones your body already uses to control hunger and digestion. Semaglutide copies a gut hormone that tells your brain you’re full and slows how fast your stomach empties. Tirzepatide does something similar but targets two related gut hormones at once, aiming to reduce appetite and change how the body handles sugar and fat. They were developed for diabetes and later tested specifically to help people with obesity. The research on these drugs includes large clinical trials in people with obesity. Those trials found substantial average weight loss for many participants who used the medicines alongside diet and lifestyle support. Semaglutide and tirzepatide generally produced more weight loss than older medications. However, results vary between individuals, and the trials usually lasted months to a few years. That means we have good evidence they can work in the short to medium term for many people, but the degree of benefit and how long it lasts after stopping the drug are still active questions. This matters because obesity is common and linked to health risks like diabetes, heart disease, and joint problems. For people who’ve struggled with weight through diet and exercise alone, these drugs offer a new option that can lead to meaningful weight loss and improvements in health markers. Clinicians may consider them for patients where the potential benefits outweigh the downsides, especially when lifestyle changes haven’t worked sufficiently. There are important caveats and risks. These drugs are prescription medicines, not over-the-counter supplements, and they can cause side effects such as nausea, diarrhea, and changes in appetite. Long-term safety beyond the trial periods is still being monitored. Stopping the medication often leads to some weight regain. Not everyone is a candidate—people with certain medical histories or who are pregnant should not use them. Regulatory approvals and recommended uses differ between countries and drugs, so medical guidance is essential. Bottom line: Semaglutide and tirzepatide represent a meaningful advance in medical treatment options for obesity, with strong trial evidence for weight loss in many people, but they are prescription drugs with side effects and unanswered long-term questions, so decisions about using them should be made with a healthcare provider.
Source: observatoireprevention.org