Three words, three rows
Dyspepsia means discomfort in the upper belly, often with burning or early fullness after eating. MedlinePlus is clear that it is not the same as heartburn, which is a burning feeling behind the breastbone that usually comes from acid rising into the food pipe. [7][6] The Victoza® US label counts dyspepsia in Table 1, and the Medication Guide calls it indigestion. [1] The European table lists dyspepsia, gastritis and reflux disease as separate common reactions, and the leaflet explains that the sign of reflux is heartburn. [2]
| Group | People in group | Reported dyspepsia |
|---|---|---|
| Placebo | 661 | 1% |
| Liraglutide 1.2 mg | 645 | 4% |
| Liraglutide 1.8 mg | 1,024 | 7% |
Indigestion, gastritis and reflux by trial
The Canadian monograph breaks the upper-gut complaints into separate rows for each trial. [3] Dyspepsia is the largest of them and shows the clearest rise at 1.8 mg; reflux itself was recorded in under 3% of people on Victoza® in every trial. [3]
| Trial and term | Victoza® | Comparison |
|---|---|---|
| LEAD-2, dyspepsia [3] | 0.6 mg 3.7%; 1.2 mg 2.1%; 1.8 mg 7.0% | Placebo 0.8%; glimepiride 1.2% |
| LEAD-2, gastritis [3] | 0.6 mg 3.3%; 1.2 mg 2.5%; 1.8 mg 5.0% | Placebo 0.8%; glimepiride 0.8% |
| LEAD-2, reflux disease [3] | 0.6 mg 1.7%; 1.2 mg 0.8%; 1.8 mg 0.4% | Placebo 0.0%; glimepiride 0.0% |
| LEAD-5, dyspepsia [3] | 1.8 mg 6.5% | Placebo 0.9%; insulin glargine 1.7% |
| Trial 1860, dyspepsia [3] | 1.2 mg 3.2%; 1.8 mg 6.4% | Sitagliptin 2.3% |
| Trial 1860, reflux disease [3] | 1.2 mg 1.4%; 1.8 mg 2.3% | Sitagliptin 0.9% |
| EU frequency class [2] | Dyspepsia, gastritis, reflux disease: common | — |
What studies outside the label add
Two recent analyses looked at reflux across GLP-1 medicines, not Victoza® alone. A UK cohort study emulating a trial followed 24,708 adults with type 2 diabetes who started a GLP-1 medicine and 89,096 who started an SGLT-2 inhibitor. Over about three years, reflux was 27% more likely with GLP-1 medicines, an extra 0.7 cases per 100 people, and its complications were also more frequent. [4] The authors note that diet and lifestyle were not recorded, so some confounding may remain. [4]
A 2025 meta-analysis of 55 placebo-controlled randomised trials judged that GLP-1 medicines probably increase reflux, by about 4 extra cases per 1,000 people, while having little or no effect on gastritis, oesophagitis and ulcers. [5] Neither study reports liraglutide separately, so they describe the class.
Why it might happen
Label-supported: Victoza® delays gastric emptying, which is part of how it lowers blood sugar after meals. [1] Food staying longer in the stomach is the documented change most closely tied to fullness and upper-belly discomfort.
Proposed in research: the cohort study names delayed stomach emptying as a known risk factor for reflux and tested whether GLP-1 medicines raise reflux risk; it found an association, which does not by itself prove the mechanism. [4]
General medicine: MedlinePlus explains heartburn as stomach contents moving back up when the muscle band at the bottom of the food pipe does not close tightly. [6]
Before surgery, sedation and other tablets
Because the stomach empties more slowly, rare cases of food or liquid entering the lungs have been reported in people on GLP-1 medicines who had general anaesthesia or deep sedation despite fasting as instructed. [1] The label says there is not enough data to recommend a specific way to reduce this risk and asks you to tell your healthcare providers about Victoza® before any planned procedure. [1] The European text says the higher chance of food remaining in the stomach should be considered before such procedures. [2]
The same slowing can, in principle, change how tablets taken by mouth are absorbed. In the label’s studies this did not reach a clinically relevant degree, but the label still asks for caution. [1]
Other causes of a burning chest
MedlinePlus lists a hiatal hernia, pregnancy and a range of medicines that can cause or worsen heartburn, including beta-blockers and calcium channel blockers for blood pressure or heart disease, some asthma medicines, sedatives and tricyclic antidepressants. [6] For indigestion it adds gallstones, gastritis, pancreatitis, ulcers, and aspirin or anti-inflammatory painkillers, along with eating too fast, fatty meals, alcohol and stress. [7] Victoza®’s own warnings include pancreatitis and gallbladder disease, both of which can start as upper-belly discomfort. [1]
Most importantly, MedlinePlus warns that some people who think they have heartburn are having a heart attack. [6] Many Victoza® users have type 2 diabetes with heart disease, which is the group studied in the LEADER trial. [1]
What the sources describe
- Trigger foods and drinks: MedlinePlus lists alcohol, caffeine, fizzy drinks, chocolate, citrus, mint, spicy or fatty food and tomato sauces as common reflux triggers. [6]
- Eating habits: smaller meals, not bending or exercising right after eating, and leaving a gap between the last meal and bedtime. [6]
- At night: raising the head of the bed helps more than extra pillows, according to MedlinePlus. [6]
- Other habits: loose clothing around the waist, stopping smoking and ways to manage stress. [6]
- Over-the-counter medicines: MedlinePlus describes antacids and acid-reducing products; ask your pharmacist which fits with your other medicines, and do not stop a prescribed medicine on your own. [6]
Victoza® is a registered trademark of Novo Nordisk A/S. PepLabo is not affiliated with or endorsed by Novo Nordisk A/S.
When to get help
The signs and contact information below come from this article’s sourced guidance.
Emergency
- Burning with squeezing, crushing or pressure in the chest, or pain spreading to the jaw, arm or back with sweating
Contact: Emergency services (911 or local number)
- Vomit with blood or coffee-ground material, or black or maroon stools
Contact: Urgent medical care
MedlinePlus [6]
- Severe upper belly pain that does not go away, sometimes into the back
Contact: Stop Victoza® and call your provider straight away
Medication Guide [1]
Today
At your next appointment
- Heartburn several times a week, or not settling after a few weeks of self-care
Contact: Book an appointment
MedlinePlus [6]