How long do side effects of erdafitinib last?

The duration of side effects of erdafitinib varies from individual to individual and usually depends on the patient's health, the dose of the drug, and how long treatment lasts. Side effects may appear within a few days of starting treatment, but some may not appear until weeks or months into treatment. Common side effects of erdafitinib include fatigue, hand-foot syndrome (redness, swelling, pain in the hands and feet), high blood pressure, proteinuria, etc. These side effects are usually reversible and may lessen when the drug is discontinued or the dose is adjusted. However, some patients may experience longer-lasting or severe side effects. Patients should pay close attention to any new symptoms while taking erdafitinib and report them to their doctor promptly. The doctor will evaluate the patient's specific situation and may take appropriate measures, such as adjusting the dose, providing supportive care, or suspending the medication.