Drug interactions
Cromolyn sodium + Methacholine
Severity: Minor
Cromolyn sodium and Methacholine: minor interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Cromolyn can reduce bronchial responsiveness and may blunt the response to methacholine challenge. This can cause a false-negative or less sensitive test result.
What this interaction means in plain words
Cromolyn sodium and Methacholine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Cromolyn sodium belongs to Respiratory; Methacholine belongs to Respiratory.
Why it happens
Cromolyn stabilizes mast cells and reduces airway reactivity, partly opposing the effect of methacholine.
What to do
Follow the testing protocol for holding inhaled cromolyn before methacholine challenge, and record any use when interpreting results.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Cromolyn sodium and Methacholine, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Methacholine
- Methacholine + Theophylline Moderate
Frequently asked questions
Can I take Cromolyn sodium with Methacholine?
MediHelp rates the interaction as minor. Cromolyn sodium and Methacholine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Cromolyn can reduce bronchial responsiveness and may blunt the response to methacholine challenge. This can cause a false-negative or less sensitive test result.
How serious is the interaction between Cromolyn sodium and Methacholine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Follow the testing protocol for holding inhaled cromolyn before methacholine challenge, and record any use when interpreting results.
What other medicines interact with Methacholine?
MediHelp also lists interactions of Methacholine with, for example, Theophylline. The full list is on the Methacholine page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
