The chronic co-administration of ATROVENT inhalation with other anticholinergic drugs has not been studied. Therefore, the chronic co-administration of ATROVENT with other anticholinergic drugs is not recommended.
Beta-adrenergics and xanthine preparations may intensify the bronchodilatory effect.
The risk of acute glaucoma in patients with a history of narrow-angle glaucoma (see Precautions) may be increased when nebulised ipratropium bromide and beta-mimetics are administered simultaneously.