What Is Amoxicillin/Vonoprazan? Uses, Dosage, and What You Need to Know in 2026

If your doctor told you that you have H. pylori and handed you a prescription for Amoxicillin/Vonoprazan (brand name Voquezna Dual Pak), you might be wondering: what is this medication, how does it work, and what should I expect? Here's a complete patient-friendly overview for 2026.

What Is Amoxicillin/Vonoprazan?

Amoxicillin/Vonoprazan is a combination prescription medication sold as Voquezna Dual Pak, made by Phathom Pharmaceuticals. It co-packages two distinct drugs:

• Vonoprazan (Voquezna) — A potassium-competitive acid blocker (PCAB) that reduces stomach acid. Vonoprazan is the first drug of its class approved in the U.S. and is more potent and longer-acting than traditional proton pump inhibitors (PPIs) like omeprazole.
• Amoxicillin — A penicillin-class antibiotic that kills H. pylori bacteria. Amoxicillin resistance rates are very low (less than 3% in the U.S.), making it a reliable component of H. pylori eradication therapy.

The FDA approved Voquezna Dual Pak on May 3, 2022. It became commercially available in U.S. pharmacies in December 2023.

What Is Amoxicillin/Vonoprazan Used For?

Amoxicillin/Vonoprazan (Voquezna Dual Pak) is FDA-approved for one indication:

• Treatment of Helicobacter pylori (H. pylori) infection in adults

H. pylori is a bacteria that lives in the stomach lining and is responsible for most peptic ulcers, chronic gastritis (stomach inflammation), and is associated with an increased risk of stomach cancer if left untreated long-term. It affects roughly 30–40% of U.S. adults, though many have no symptoms.

The 2024 ACG guidelines recommend vonoprazan dual therapy (amoxicillin + vonoprazan) as an empiric first-line alternative for treatment-naive adults who do not have a penicillin allergy.

How Do You Take Amoxicillin/Vonoprazan?

Voquezna Dual Pak comes in dosing cards (blister packs) with clearly labeled morning, midday, and evening doses. The complete regimen is:

• Vonoprazan 20 mg tablet: Take 1 tablet twice daily (morning and evening, 12 hours apart)
• Amoxicillin 500 mg capsules: Take 2 capsules (= 1,000 mg total) three times daily (morning, midday, and evening)
• Duration: 14 days total
• With or without food: You may take it either way; taking with food may help reduce nausea.

Do not stop early, even if you feel better. Completing the full 14-day course is essential to fully eradicate H. pylori and prevent antibiotic resistance.

Who Should NOT Take Amoxicillin/Vonoprazan?

You should not take Voquezna Dual Pak if you:

• Are allergic to amoxicillin, other penicillins, or cephalosporin antibiotics
• Are allergic to vonoprazan
• Take rilpivirine (a medication for HIV-1 infection) — vonoprazan reduces stomach acid in a way that decreases rilpivirine absorption
• Have severe kidney disease (eGFR < 30 mL/min) — not recommended
• Have moderate-to-severe liver disease (Child-Pugh Class B or C) — not recommended

What Happens After You Finish Treatment?

After completing the 14-day course, your doctor will typically recommend a test of cure — confirming that H. pylori has been successfully eradicated. This is done using a urea breath test or stool antigen test, performed at least 4 weeks after finishing antibiotics and 2 weeks after stopping any acid suppressants.

If eradication is confirmed, no further antibiotic treatment is needed. If H. pylori persists, your doctor will discuss a second-line regimen.

The Bottom Line

Amoxicillin/Vonoprazan (Voquezna Dual Pak) is a first-in-class H. pylori treatment that combines a powerful acid blocker with a well-tolerated antibiotic. Its 14-day course is straightforward, and the medication is FDA-approved with solid clinical trial evidence. If you're curious about how it works at a deeper level, see our explainer: How Does Amoxicillin/Vonoprazan Work?