esomeprazole vs posaconazole
Side-by-side comparison of esomeprazole and posaconazole. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
major Known Drug Interaction
Interaction Drug Interaction Rifabutin, phenytoin, efavirenz, cimetidine, esomeprazole* Avoid coadministration unless the benefit outweighs the risks ( 7.6 , 7.7 , 7.8 , 7.9 ) Other drugs metabolized by CYP3A4 Consider dosage adjustment and monitor for adverse effects and toxicity ( 7.1 , 7.10 , 7.11 ) Digoxin Monitor digoxin plasma concentrations ( 7.12 ) Fosamprenavir, metoclopramide* Monitor for breakthrough fungal infections ( 7.6 , 7.13 ) *The drug interactions with esomeprazole and metoclopramide do not apply to posaconazole tablets.
Recommendation: Avoid taking these together unless your doctor determines the benefits are greater than the risks. Note that this warning may not apply if you are taking the tablet form of posaconazole.
Nexium
Noxafil
Esomeprazole (Nexium) is a drug that reduces stomach acid. It belongs to a class of drugs called proton pump inhibitors (PPIs).
Posaconazole is an antifungal medicine. It helps prevent certain fungal infections in people with weakened immune systems.
This medicine treats frequent heartburn. Frequent heartburn means you have heartburn 2 or more days a week. This medicine is not for immediate relief of heartburn. It may take 1 to 4 days to work fully.
Posaconazole prevents Aspergillus and Candida infections. You may need this medicine if you have a high risk of getting these infections. This often includes people who had a stem cell transplant or have certain blood cancers and are on chemotherapy.
Esomeprazole works by reducing the amount of acid your stomach makes. It blocks the proton pump in your stomach lining. This pump is responsible for producing stomach acid.
Posaconazole belongs to a class of drugs called azole antifungals. It works by stopping the growth of fungi. This helps your body fight off the infection.
- • Nausea
- • Diarrhea
- • Headache
- • Diarrhea
- • Nausea
- • Fever
- • Vomiting
- • Headache
- Long-term kidney disease 5,020
- Sudden kidney damage 4,563
- Feeling sick to your stomach 4,005
- Loose or watery stools 3,869
- Feeling very tired 3,528
- Fever with low white blood cell count 1,018
- The medicine is interacting with another medicine 930
- Death 928
- Fever 850
- Low white blood cell count 705
Do not take this medicine for more than 14 days, or more often than every 4 months, unless your doctor tells you to.
Posaconazole can interact with many other medicines. It can cause heart rhythm problems (QT prolongation). It can also cause liver problems. Tell your doctor about all the medicines you take.
Tell your doctor if you are pregnant or plan to become pregnant. Also, tell your doctor if you are breastfeeding or plan to breastfeed.
Posaconazole may harm an unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant. It is not known if posaconazole passes into breast milk, so talk to your doctor if you are breastfeeding.
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How to Read This esomeprazole vs posaconazole Comparison
esomeprazole is classified in the Proton Pump Inhibitor (PPI) drug class, while posaconazole sits within the Azole Antifungal class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are split between OTC and prescription status, which affects access and supervision.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, esomeprazole has 20,985 submissions while posaconazole has 4,431. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known major interaction flagged in FDA labeling, attributed to esomeprazole changes the acid levels in the stomach, which can prevent certain forms of posaconazole from being absorbed into the body. this may make the antifungal treatment less effective.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot substitute for clinical judgment. Effectiveness, tolerability, drug-drug interactions with your other medications, kidney and liver function, pregnancy status, insurance formulary, and price all feed into a decision that only a licensed prescriber can make responsibly. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This page is for educational purposes only, is not medical advice, and should not be used to self-switch between esomeprazole and posaconazole - always consult your physician or pharmacist first.
Important: This comparison is for informational purposes only. Drug effects vary between individuals. Always consult your doctor or pharmacist for personalized medical advice.