How long does it take for skin rash to appear after taking Osimertinib?

Some patients may experience other gastrointestinal reactions such as nausea, vomiting, loss of appetite, constipation, etc., as well as skin damage reactions such as rash, skin itching, and dry skin when using Osimertinib. Rash is one of the most common side effects. For patients who develop rash, the onset time is generally within the first month of taking the drug, and the incidence rate is approximately 40%-50%. Some patients' rash appears as mild red spots, while others may have more obvious symptoms such as papules, blisters, and scaling. Generally speaking, mild rashes can resolve on their own, but if symptoms seriously affect normal life, it is recommended to seek medical attention immediately.