Filgotinib has been administered in clinical studies following single and once daily administration up to 450 mg without dose limiting toxicity. Adverse reactions were comparable to those seen at lower doses and no specific toxicities were identified. Pharmacokinetic data following a single dose of 100 mg filgotinib in healthy subjects indicate that approximately 50% of the administered dose is eliminated within 24 hours of dosing and 90% of the dose is eliminated within 72 hours. In case of an overdose, it is recommended that a patient be monitored for signs and symptoms of adverse reactions. Treatment of overdose with filgotinib consists of general supportive measures including monitoring of vital signs as well as observation of the clinical status of the patient. It is unknown whether filgotinib can be removed by dialysis.