Dizziness on GLP-1 medicines

In short

Dizziness is listed in some GLP-1 label tables. Dehydration, low intake, blood pressure drops with weight loss and low blood sugar are common causes.

Why it happens

Eating and drinking less, plus fluid loss from vomiting or diarrhea, can lower blood volume. That can make you lightheaded, especially when you stand up fast.

Weight loss can also lower blood pressure, which is often welcome but may mean blood pressure medicines need review. People on insulin or sulfonylureas can feel dizzy from low blood sugar.

When it starts and fades

Dizziness tends to appear in the early weeks or after dose increases, when intake drops and stomach side effects peak.

If it starts later, after significant weight loss, ask whether your blood pressure or diabetes medicines need review.

What helps

• Drink fluids steadily through the day, not just at meals.
• Stand up slowly, especially in the morning.
• Do not go many hours without eating.
• Check your blood pressure at home if you have a cuff and share readings with your prescriber.
• If you have diabetes, check your blood sugar when dizzy if you have a meter.