Lansoprazole and Itraconazole Interaction
Drug interaction information between Lansoprazole and Itraconazole.
Lansoprazole and Itraconazole have a documented minor interaction in FDA labeling.
FDA drug labeling documents a minor-severity interaction between Lansoprazole and Itraconazole. This page displays the available source-record category and label text. The category is not an individual risk estimate or medication-combination direction.
How They Interact
Lansoprazole reduces stomach acid, which is needed for itraconazole to be absorbed into the body.
FDA Label Information
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.
Lansoprazole Also Interacts With
- Amoxicillin major
- Clarithromycin major
- Rifampin moderate
- Tacrolimus Topical moderate
- Warfarin minor
Itraconazole Also Interacts With
- Isavuconazonium major
- Lurasidone major
- Pimozide major
- Methadone major
- Midazolam major
Frequently Asked Questions
What SPL severity band is on file for Lansoprazole + Itraconazole?
Compiled FDA labeling labels this pair minor. That is a source-record field, not an individual medication-combination decision.
Which drug in this pair has the larger labeled-interaction portfolio?
Itraconazole has 116 labeled pairs on file vs Lansoprazole's 14. In the minor band specifically: Lansoprazole has 10 (also Warfarin, Methotrexate, Ketoconazole, Voriconazole); Itraconazole has 77 (also Fluticasone, Meloxicam, Buspirone, Oxycodone).
What mechanism field is on file for Lansoprazole and Itraconazole?
Lansoprazole reduces stomach acid, which is needed for itraconazole to be absorbed into the body.
Itraconazole carries more major-labeled pairs than Lansoprazole
SPL source-record counts only. This page's band is minor · classes on file: Lansoprazole (Proton Pump Inhibitor (PPI)); Itraconazole (Azole Antifungal).
Itraconazole has 19 major-labeled pairs vs Lansoprazole's 2. This page itself is in the minor band, not the major band.
2 major · 2 moderate · 10 minor · 14 total
- Other minor peers for Lansoprazole
- Warfarin
- Methotrexate
- Ketoconazole
- Voriconazole
19 major · 20 moderate · 77 minor · 116 total
- Other minor peers for Itraconazole
- Fluticasone
- Meloxicam
- Buspirone
- Oxycodone
Sources: FDA Drug Labels (SPL) via openFDA (2026). This is for informational purposes only and is not medical advice. This registry does not provide individual medication-combination directions.
Read our methodology - how this data is sourced, computed, and verified.