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Drug Interactions between Betimol and methacholine

This report displays the potential drug interactions for the following 2 drugs:

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Interactions between your drugs

Major

methacholine timolol ophthalmic

Applies to: methacholine and Betimol (timolol ophthalmic)

CONTRAINDICATED: Patients who are concurrently receiving beta blockers may have exaggerated or prolonged responses (i.e., bronchoconstriction) to methacholine challenge and may not respond readily to treatment. Beta-2-adrenergic blockade increases airway resistance. Ophthalmically applied beta blockers undergo some systemic absorption and potentially may also interact.

MANAGEMENT: Administration of methacholine to a patient on any beta blocker therapy is considered contraindicated.

References

  1. (2002) "Product Information. Provocholine (methacholine)." Methapharm Inc

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Drug and food interactions

No alcohol/food interactions were found. However, this does not necessarily mean no interactions exist. Always consult your healthcare provider.

Therapeutic duplication warnings

No warnings were found for your selected drugs.

Therapeutic duplication warnings are only returned when drugs within the same group exceed the recommended therapeutic duplication maximum.

See also

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Drug Interaction Classification

These classifications are only a guideline. The relevance of a particular drug interaction to a specific individual is difficult to determine. Always consult your healthcare provider before starting or stopping any medication.
Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan.
Unknown No interaction information available.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

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