Methacholine

26 interactions 4 explained in plain English
Dr. Brian Staiger, PharmD, BCPS
Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Updated Jul 4, 2026 · Editorial policy · Data sources

Sources: FDA prescribing information (Structured Product Labeling), the published literature cited in each entry, DDInter 2.0 (a major open-access drug-interaction database), and legacy DrugBank interaction data distributed by the NIH's RxNav service (decommissioned in 2024) — analyzed and reviewed by our pharmacist team. How we build this library →

Most serious with: Isoetharine Oral Inhalation Albuterol Oral Inhalation Trospium / Xanomeline Olodaterol Oral Inhalation Glycopyrronium Topical Cyclopentolate Ophthalmic
15 Major 11 Moderate
All (26) Major (15) Moderate (11)

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Educational information only, not medical advice. Always confirm interactions with your pharmacist or prescriber before making any change to your medications.