Why can't you take antihistamines with emphysema?

Antihistamines can cause dryness of the respiratory tract and may thicken mucus, potentially worsening breathing difficulties in individuals with emphysema. Additionally, some antihistamines can have sedative effects, which might impair respiratory function. It's essential for those with emphysema to consult a healthcare professional before taking antihistamines to avoid exacerbating their condition.