GLP-1 Side Effects: What to Expect and How to Manage Them

GLP-1 Side Effects: What to Expect and How to Manage Them

Starting a GLP-1 treatment can feel like a big step, and it’s completely normal to have questions about side effects. Most people do experience some changes in how their body feels at the beginning, but in the majority of cases, these are mild and improve as your body adjusts.

Common Side Effects

Because GLP-1 medications slow digestion, some side effects are expected early on. These can include nausea, diarrhoea, bloating or a feeling of fullness, and indigestion or reflux. These symptoms are usually temporary and tend to settle within the first few weeks as your body adapts.

Eating Well and Protecting Muscle

One of the biggest changes people notice is a reduced appetite. While this can support weight loss, it also means it’s important to stay mindful of your nutrition. Making sure you’re eating enough protein can help maintain muscle mass while losing weight. Individual needs vary, but many people benefit from aiming for adequate daily protein intake alongside a balanced diet. Strength-based exercise, even light resistance training, can also support muscle health during your weight loss journey. Some people may also notice temporary hair shedding, which is often linked to lower calorie intake and tends to improve over time as nutrition stabilises.

What Are Sulphur Burps?

You may have seen people talk about sulphur burps. These are burps that can smell or taste like rotten eggs. They happen because GLP-1 treatments slow how quickly food leaves the stomach. When food stays in the stomach longer, it can lead to more gas production during digestion. This can result in increased fermentation in the gut, more gas including hydrogen sulphide, and occasional sulphur burps. They’re most common when starting treatment, after increasing your dose, and during the first few weeks. While they can be unpleasant, they’re not harmful and usually improve over time.

How to Reduce Symptoms

There are a few simple ways to make side effects more manageable. Eat smaller, more frequent meals, slow down when eating and chew thoroughly, avoid foods that may trigger symptoms such as eggs, red meat, beans, broccoli, cabbage or cauliflower, limit fizzy drinks, stay well hydrated, and try peppermint tea which may help settle digestion. Some people find probiotics helpful, although results can vary. If symptoms feel persistent or uncomfortable, your clinician can review your dose and provide guidance.

When to Seek Medical Advice

Serious side effects are rare, but it’s important to be aware of them. You should seek medical advice if you experience severe or persistent abdominal pain or symptoms that don’t improve over time. In rare cases, GLP-1 treatments have been associated with conditions such as pancreatitis or gallbladder issues, which require prompt assessment.

The Bottom Line

Side effects are a normal part of starting GLP-1 treatment, but for most people, they are mild, manageable and temporary. Understanding what to expect and making small adjustments to your routine can make a big difference to how you feel during the early stages. If you’re ever unsure, speaking to a clinician can help you stay on track and get the most from your treatment.

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