Does Itraconazole Interact With Lansoprazole?
Drugs Dependent on Gastric pH for Absorption (e.g., iron salts, erlotinib, dasatinib, nilotinib, mycophenolate mofetil, ketoconazole/itraconazole) Clinical Impact: Lansoprazole can reduce the absorption of other drugs due to its effect on reducing intragastric acidity.
Severity: Minor
Severity basis: drug interactions section. Combining Itraconazole (Azole antifungal (strong CYP3A4 inhibitor)) and Lansoprazole (Proton pump inhibitor) is classified as a minor interaction.
What to Do
This is generally a minor interaction, but review it with your pharmacist to be sure it is safe for you.
How This Interaction Works
Interactions like this one can happen when two medicines have overlapping effects, or when one changes how the other is absorbed, broken down, or cleared from the body. Itraconazole is a azole antifungal (strong cyp3a4 inhibitor) and Lansoprazole is a proton pump inhibitor; together they are documented as a minor interaction. How much this matters depends on your dose, your other medications, and your overall health.
If You Take Both Medications
If you have been prescribed both Itraconazole and Lansoprazole, do not start, stop, or change either medication on your own — some medicines are unsafe to stop suddenly. Tell your prescriber and pharmacist that you take both so they can decide whether the combination is right for you, adjust the dose, monitor you more closely, or suggest an alternative.
From the FDA Label
Drugs Dependent on Gastric pH for Absorption (e.g., iron salts, erlotinib, dasatinib, nilotinib, mycophenolate mofetil, ketoconazole/itraconazole) Clinical Impact: Lansoprazole can reduce the absorption of other drugs due to its effect on reducing intragastric acidity.
Source: FDA structured product labeling (set_id 00a574e0-bd03-deea-9f85-b108f78982ba).
Itraconazole
Azole antifungal (strong CYP3A4 inhibitor)
Brands: Sporanox, Tolsura
View Itraconazole safety profileCheck these against your full medication list in our free Interaction Checker
Frequently Asked Questions
Can you take Itraconazole and Lansoprazole together?
Itraconazole and Lansoprazole have a documented minor interaction. This is generally a minor interaction, but review it with your pharmacist to be sure it is safe for you.
How serious is the Itraconazole and Lansoprazole interaction?
It is classified as a minor interaction, based on the FDA label's drug interactions section. A minor interaction is usually limited in effect but is still worth discussing with your care team.
What should I do if I'm taking both Itraconazole and Lansoprazole?
If you have been prescribed both Itraconazole and Lansoprazole, do not start, stop, or change either medication on your own — some medicines are unsafe to stop suddenly. Tell your prescriber and pharmacist that you take both so they can decide whether the combination is right for you, adjust the dose, monitor you more closely, or suggest an alternative.
This information is educational — not medical advice.
This page is provided for general educational purposes and summarizes publicly available data from sources such as the U.S. Food & Drug Administration. It is not a substitute for the judgment of a licensed clinician and should not be used to start, stop, or change any medication. It may be incomplete or out of date, and individual circumstances vary. Always talk with your prescriber or pharmacist about your specific medications and health conditions. If you think you may have a medical emergency, call 911.
Other Itraconazole Interactions
- Itraconazole + Colchicine(contraindicated)
- Itraconazole + Lovastatin(contraindicated)
- Itraconazole + Simvastatin(contraindicated)
- Itraconazole + Ticagrelor(contraindicated)
- Itraconazole + Apixaban(major)
- Itraconazole + Carbamazepine(major)
- Itraconazole + Fluticasone Salmeterol(major)
- Itraconazole + Phenytoin(major)
- Itraconazole + Rifampin(major)
- Itraconazole + Rivaroxaban(major)
- Itraconazole + Sildenafil(major)
- Itraconazole + Tadalafil(major)
- Itraconazole + Tamsulosin(major)
- Itraconazole + Trazodone(major)
- Itraconazole + Alprazolam(moderate)
- Itraconazole + Aripiprazole(moderate)
- Itraconazole + Atorvastatin(moderate)
- Itraconazole + Budesonide(moderate)
- Itraconazole + Buprenorphine Naloxone(moderate)
- Itraconazole + Buspirone(moderate)
- Itraconazole + Ciprofloxacin(moderate)
- Itraconazole + Clarithromycin(moderate)
- Itraconazole + Cyclosporine(moderate)
- Itraconazole + Dabigatran(moderate)
- Itraconazole + Dexamethasone(moderate)
- Itraconazole + Diazepam(moderate)
- Itraconazole + Digoxin(moderate)
- Itraconazole + Diltiazem(moderate)
- Itraconazole + Fluticasone(moderate)
- Itraconazole + Methylprednisolone(moderate)
- Itraconazole + Mirtazapine(moderate)
- Itraconazole + Oxybutynin(moderate)
- Itraconazole + Oxycodone(moderate)
- Itraconazole + Quetiapine(moderate)
- Itraconazole + Risperidone(moderate)
- Itraconazole + Tacrolimus(moderate)
- Itraconazole + Venlafaxine(moderate)
- Itraconazole + Verapamil(moderate)
- Itraconazole + Warfarin(moderate)
- Itraconazole + Eszopiclone(minor)
- Itraconazole + Famotidine(minor)
- Itraconazole + Ketoconazole(minor)
- Itraconazole + Meloxicam(minor)
- Itraconazole + Montelukast(minor)
- Itraconazole + Pantoprazole(minor)
Other Lansoprazole Interactions
- Lansoprazole + Amoxicillin(contraindicated)
- Lansoprazole + Clarithromycin(contraindicated)
- Lansoprazole + Rifampin(major)
- Lansoprazole + Clopidogrel(moderate)
- Lansoprazole + Digoxin(moderate)
- Lansoprazole + Tacrolimus(moderate)
- Lansoprazole + Cyanocobalamin(minor)
- Lansoprazole + Ferrous Sulfate(minor)
- Lansoprazole + Ketoconazole(minor)
- Lansoprazole + Methotrexate(minor)
- Lansoprazole + Sucralfate(minor)
- Lansoprazole + Warfarin(minor)