What should I do if I develop a rash while using afatinib?

If you develop a rash or other adverse reaction while using afatinib (or other medicines), the most important thing is to contact your doctor or medical professional immediately. Stop using the drug: If you suspect a rash or allergic reaction caused by afatinib, you should stop using the drug immediately and do not use it again before consulting your doctor; See medical advice: Contact your doctor or professional medical team promptly. They will evaluate your condition based on your symptoms and personal circumstances and provide appropriate advice;Describe your symptoms: When you talk to your doctor, describe your symptoms in as much detail as possible, including the specific location of the rash, the severity of the symptoms, and when they occurred.