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Other Systemic Drugs For Obstructive Airway Diseases: shortage status in Canada

4 of the 7 other systemic drugs for obstructive airway diseases rxstat tracks are currently in shortage in Canada, including 1 designated Tier 3 (most serious) by Health Canada. When one drug in a class is short, demand often shifts to its alternatives, so related drugs can tighten too; each page below shows which manufacturers are affected and the latest recovery estimates.

Aminophylline Widespread shortage 2 of 3 reported products affected · est. return Aug 31, 2026 Oxtriphylline (Choledyl) Widespread shortage 3 of 4 reported products affected Montelukast (Singulair) Partial shortage 8 of 44 reported products affected · est. return Jun 30, 2027 Theophylline (Aa-Theo La) Partial shortage 1 of 7 reported products affected Guaifenesin Oxtriphylline (Choledyl Expectorant) Discontinued 0 of 1 reported products affected Roflumilast (Daxas) No current shortage Zafirlukast (Accolate) Discontinued 0 of 1 reported products affected

Guides: what to do when your medication is in shortage · how to read these statuses

Class groupings follow the WHO ATC classification in Health Canada's reports. Data reflects manufacturer mandatory filings; see methodology.