Voquezna Side Effects: What to Expect and When to Call Your Doctor

Voquezna (vonoprazan) is generally well tolerated, and most patients don't experience significant side effects. But like any medication, it can cause side effects — some minor and manageable, others serious enough to stop treatment. This guide covers everything you need to know about Voquezna's safety profile in plain language.

Common Side Effects of Voquezna

The most common side effects reported in clinical trials for Voquezna 10 mg and 20 mg (for GERD/erosive esophagitis) include:

• Gastritis/stomach inflammation: Stomach discomfort, sometimes described as burning or bloating.

• Diarrhea: Loose stools that are usually mild and resolve with continued use.

• Nausea: Usually mild; taking Voquezna with food may help.

• Abdominal pain: Stomach cramps or discomfort.

• Indigestion (dyspepsia): Feeling of fullness or discomfort after eating.

• Constipation: Less frequent than diarrhea.

• Urinary tract infection (UTI): Reported in some patients, though not directly caused by the mechanism.

• High blood pressure: Monitor if you have a history of hypertension.

When used in combination with antibiotics (Triple Pak or Dual Pak) for H. pylori, additional common side effects include diarrhea, nausea, vomiting, changes in taste (dysgeusia), yeast infections (candidiasis), and headache.

Serious Side Effects: When to Get Help Immediately

Certain side effects are rare but serious. If you experience any of the following, stop Voquezna and contact your doctor or seek emergency care:

• Severe allergic reaction (anaphylaxis): Symptoms include difficulty breathing, rash, itching, or swelling of your face, lips, tongue, or throat. Stop Voquezna immediately and call 911.

• Kidney problems (acute tubulointerstitial nephritis): Signs include decreased urination, blood in urine, fever, joint pain, unusual tiredness, or swelling in legs/ankles. Call your doctor right away.

• Clostridioides difficile (C. diff) diarrhea: Watery stools, severe stomach pain, and fever that doesn't go away. C. diff risk increases with acid-lowering medications because stomach acid normally kills many harmful bacteria. Seek care if you develop this combination of symptoms.

• Severe skin reactions (Stevens-Johnson Syndrome / TEN): Rare but potentially life-threatening. Watch for blistering, peeling, or bleeding on any part of your skin; fever; chills; or shortness of breath. Stop Voquezna immediately and go to the ER.

• Low magnesium (hypomagnesemia): Can cause muscle spasms, irregular heartbeat, tremors, or seizures, especially with long-term use. Your doctor may check magnesium levels periodically.

Long-Term Side Effect Risks

With prolonged use (as in erosive esophagitis maintenance therapy up to 6 months), be aware of:

• Vitamin B12 deficiency: Stomach acid is needed to absorb B12 from food. Long-term acid suppression may reduce B12 absorption. Symptoms include fatigue, numbness or tingling in arms/legs, weakness, or irregular heartbeat.

• Bone fractures: Observational studies on PPIs suggest increased risk of hip, wrist, or spine fractures with long-term high-dose use. Vonoprazan may carry similar risk; use the shortest duration necessary.

• Fundic gland polyps: Small stomach growths, usually benign, reported with vonoprazan and PPIs. Typically discovered incidentally on endoscopy.

Side Effects of the Voquezna Combination Packs (Triple/Dual Pak)

Voquezna Triple Pak and Dual Pak carry additional warnings because they contain antibiotics:

• Triple Pak only — QT prolongation risk: Clarithromycin can prolong the QT interval. Avoid in patients with known QT prolongation, taking Class IA or III antiarrhythmics, or with hypokalemia/hypomagnesemia.

• Triple Pak only — hepatotoxicity: Clarithromycin-related liver inflammation. Discontinue if signs of hepatitis develop.

• Embryo-fetal toxicity (Triple Pak): Clarithromycin may harm an unborn baby. Do not use Triple Pak if pregnant.

Tips for Managing Side Effects

• Take Voquezna with food if it upsets your stomach

• Stay hydrated, especially if you have diarrhea

• Don't stop Voquezna abruptly — discuss any concerns with your doctor first

• Report any new or worsening symptoms to your prescriber

The Bottom Line

Most people tolerate Voquezna well, and serious side effects are rare. Know what to watch for, take it as prescribed, and contact your doctor if you notice concerning symptoms. For information on drug interactions, see our guide: Voquezna Drug Interactions: What to Avoid.