# How Weight-Loss Drugs Like Mounjaro and Wegovy Work
Mounjaro and Wegovy represent a new class of medications that work by mimicking hormones your body naturally produces. Both drugs belong to a family called GLP-1 receptor agonists. They function by activating receptors in your brain that control appetite and blood sugar levels.
Wegovy contains semaglutide, while Mounjaro contains tirzepatide. These medications slow how quickly your stomach empties, which means food stays in your digestive system longer. This creates a prolonged sensation of fullness, reducing hunger signals to your brain. The effect isn't psychological. It's a direct biological response triggered by the drug's mechanism.
The drugs also help regulate blood sugar, which reduces cravings for sugary foods. This dual action on appetite suppression and glucose control makes them particularly effective for people with type 2 diabetes seeking weight loss, and for those without diabetes who struggle with obesity.
Both medications are available on the NHS for certain patients who meet specific eligibility criteria, though access varies by region. They're also available privately for those who can afford them. The drugs come as once-weekly injections that patients self-administer.
Results from clinical trials show that people using these medications lose significantly more weight than those on diet and exercise alone. However, the drugs work only while you're taking them. When patients stop using Mounjaro or Wegovy, weight often returns unless lifestyle changes persist.
Common side effects include nausea, vomiting, and diarrhea, particularly when starting treatment. These typically improve over time as your body adjusts. Rare but serious side effects have been reported, including pancreatitis and thyroid concerns.
These medications work best alongside sustained dietary changes and physical activity. They're not a replacement for healthy habits but rather a