Doxofon 400mg Tablet is a medication used to treat and prevent asthma and chronic obstructive pulmonary disorder symptoms. It relaxes air passage muscles, making breathing easier. It can be taken with food in the evening, with the exact dose and duration prescribed by your doctor. Common side effects include vomiting, headache, nausea, and stomach upset. It is advised not to consume alcohol or smoke while on treatment, and to avoid high-caffeinated products. Before taking this medication, inform your doctor about any kidney, liver, heart-related problems, other medications, and if you are pregnant or breastfeeding.