My dad's 80 and he had a mild ischemic stroke and mis last year. Since then, he's been using a duolin nebulizer regularly. I'm wondering if it's safe for him to keep taking it every day?

Given your father's history of ischemic stroke and MIS, continuing Duolin nebulizer therapy may be appropriate if prescribed by his doctor to manage his breathing or airway issues. However, it's important to regularly reassess his condition with his healthcare provider to ensure it's still necessary and to adjust treatment if needed.