Voquezna Drug Interactions: What to Avoid and What to Tell Your Doctor

Before you start Voquezna (vonoprazan), it's important to review your medication list with your prescriber or pharmacist. While Voquezna is generally well tolerated, it has several significant drug interactions — one of which is a hard contraindication, meaning the combination must be avoided entirely. This guide explains all the key interactions in plain language.

Contraindicated: Do NOT Take Voquezna With These Drugs

Rilpivirine-Containing HIV Medications (Hard Contraindication)

Voquezna is absolutely contraindicated with any medication containing rilpivirine. Rilpivirine requires stomach acid for absorption. Voquezna dramatically reduces stomach acid, causing rilpivirine blood levels to drop dangerously low — potentially allowing HIV to become resistant to the drug. Brand names include:

• Edurant (rilpivirine alone)

• Complera (rilpivirine + tenofovir + emtricitabine)

• Juluca (rilpivirine + dolutegravir)

• Odefsey (rilpivirine + tenofovir alafenamide + emtricitabine)

• Cabenuva (rilpivirine injectable)

If you take any HIV medication, tell your doctor before starting Voquezna.

Major Interactions: Avoid If Possible

Strong CYP3A Inducers (Reduce Voquezna Levels)

Vonoprazan is metabolized by the CYP3A enzyme. Strong or moderate CYP3A inducers speed up vonoprazan's breakdown, reducing its blood levels significantly and potentially making it less effective. Drugs and supplements to avoid or discuss with your doctor:

• Rifampin (rifampicin): Antibiotic used for tuberculosis and other infections. Strong CYP3A inducer.

• Carbamazepine (Tegretol): Anti-seizure medication. May significantly reduce vonoprazan effectiveness.

• Phenytoin (Dilantin) and phenobarbital: Anti-seizure drugs. CYP3A inducers.

• St. John's Wort: Herbal supplement. A well-documented CYP3A inducer. Tell your doctor if you take this.

• Apalutamide, enzalutamide: Prostate cancer drugs. Strong CYP3A inducers.

Moderate Interactions: Use With Caution

Clopidogrel (Plavix) — Blood Thinner

Vonoprazan inhibits CYP2C19, the enzyme that converts clopidogrel to its active form. This means Voquezna may reduce clopidogrel's antiplatelet effect, potentially increasing the risk of blood clots in patients who take clopidogrel to prevent heart attack or stroke. This is the same concern seen with PPIs like omeprazole.

If you take clopidogrel (Plavix), talk to both your cardiologist and gastroenterologist about this interaction. An alternative antiplatelet or a different acid suppressant may be considered.

pH-Sensitive Drugs (Reduced Absorption)

Voquezna raises stomach pH (makes it less acidic). Many medications and supplements need an acidic stomach environment to be properly absorbed. When Voquezna reduces acidity, absorption of these drugs may be significantly reduced:

• Ketoconazole and itraconazole: Antifungal medications. Require acidic stomach for absorption. Avoid taking with Voquezna.

• Iron salts: Iron supplements require acid for absorption. If you're taking iron for anemia, separate doses and talk to your doctor.

• Erlotinib, dasatinib, nilotinib, gefitinib: Cancer drugs with pH-dependent absorption. Discuss with your oncologist.

• Mycophenolate mofetil (CellCept): Immunosuppressant. Elevated pH may reduce absorption.

Interactions Specific to Voquezna Triple Pak and Dual Pak

The combination packs contain clarithromycin (Triple Pak) and amoxicillin (both packs), which add their own significant interactions:

• Clarithromycin + antiarrhythmics (amiodarone, sotalol, quinidine): High risk of dangerous heart rhythm problems (QT prolongation). Avoid Triple Pak.

• Clarithromycin + colchicine: Can cause colchicine toxicity. Avoid Triple Pak.

• Clarithromycin + statins (simvastatin, lovastatin): Risk of muscle toxicity (rhabdomyolysis). Avoid or temporarily hold statins during Triple Pak treatment.

• Clarithromycin + tacrolimus/cyclosporine: May significantly increase immunosuppressant levels. Monitor carefully.

What to Tell Your Doctor Before Starting Voquezna

Provide a complete medication list to your prescriber and pharmacist, including:

• All prescription medications (including HIV drugs, heart medications, anticoagulants, and immunosuppressants)

• OTC medications (including antifungal creams that might be oral, antacids, iron supplements)

• Vitamins and supplements, especially St. John's Wort, iron, and vitamin B12

• Herbal products

The Bottom Line

The most critical interaction to know: never combine Voquezna with rilpivirine-containing HIV drugs. The most practically important for the average patient: check for CYP3A inducers, clopidogrel, and pH-sensitive medications. For a full guide on what side effects to watch for, see: Voquezna Side Effects: What to Expect.