Acalabrutinib and Nizatidine interaction
Acalabrutinib and Nizatidine: the Acalabrutinib prescribing label flags this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Acalabrutinib (CALQUENCE) label · effective 2026-02-19
• Gastric Acid Reducing Agents: Avoid co-administration with proton pump inhibitors (PPIs).
Gastric Acid Reducing Agents Clinical Effect • Co-administration of CALQUENCE with a proton pump inhibitor, H2-receptor antagonist, or antacid may decrease acalabrutinib plasma concentrations [see Clinical Pharmacology (12.3) ] .
• If treatment with a gastric acid reducing agent is required, consider using a H2‑receptor antagonist (e.g., ranitidine or famotidine) or an antacid (e.g., calcium carbonate).
H2-receptor antagonists Take CALQUENCE 2 hours before taking the H2-receptor antagonist [see Recommended Dosage for Drug Interactions (2.2) ].
Stagger dosing with H2-receptor antagonists and antacids.
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.