What should I do if I miss a dose of Afatinib (Gyterinib)?

Afatinib is an irreversible ErbB family receptor tyrosine kinase inhibitor, mainly used for patients with EGFR mutation-positive non-small cell lung cancer. As an oral targeted drug, its efficacy is closely related to regular and continuous medication use. Missing a dose may lead to a decrease in blood drug concentration, thereby reducing the therapeutic effect and even increasing the risk of drug resistance. Therefore, correct management of missed doses is critical to maintaining efficacy.

If a missed dose is found, the patient should adopt corresponding treatment strategies based on the time of missed dose and the interval between the next dose. General advice: If the next dose is far away, take the missed dose as soon as possible; if the next dose is close, skip the missed dose and take the next dose as originally planned. Do not take double the dose at one time to avoid excessive blood concentration, which may cause serious side effects such as diarrhea, rash or abnormal liver function.

After taking a missed dose or skipping a missed dose, patients should pay close attention to their physical condition and seek medical attention promptly if they experience obvious diarrhea, rash, fatigue, or abnormal liver function. Doctors may adjust subsequent doses or extend follow-up monitoring based on patient missed doses to ensure treatment safety and stable efficacy. Regular blood count, liver and kidney function and clinical symptom monitoring are important means to manage the risk of missed doses.

In order to reduce the risk of missing doses, patients can take medication at a fixed time, set an alarm clock reminder, or record a medication diary. Supervision and reminders from family members can also effectively improve compliance. Generally speaking, the management of missed doses of afatinib emphasizes scientific replenishment, avoidance of doubling the dose, close monitoring and the establishment of good medication habits to ensure that patients obtain the best efficacy and safety during long-term treatment.

Reference materials:https://www.drugs.com/