Based on the provided sources, there is limited information available regarding the safety of using lurbinectedin while breastfeeding. The sources do not specifically mention whether lurbinectedin can be safely used during breastfeeding.

The first source, DrugPatentWatch, provides information about the patent status of lurbinectedin but does not provide any information about its safety during breastfeeding [1].

The second source, DailyMed, provides detailed information about the drug, including its indications, dosage, and potential side effects. However, it does not mention anything about the safety of using lurbinectedin while breastfeeding [2].

The third source, Mayo Clinic, provides information about the side effects of lurbinectedin but does not mention its safety during breastfeeding [3].

Since the sources do not provide specific information about the safety of using lurbinectedin while breastfeeding, it is important to consult with a healthcare professional or a lactation specialist who can provide personalized advice based on your specific situation. They will be able to weigh the potential risks and benefits and provide guidance on whether it is safe to use lurbinectedin while breastfeeding.

In summary, based on the provided sources, there is no specific information available regarding the safety of using lurbinectedin while breastfeeding. It is recommended to consult with a healthcare professional for personalized advice.

Sources:
[1] DrugPatentWatch. Lurbinectedin Tradename. Retrieved from https://www.drugpatentwatch.com/p/tradename/LURBINECTEDIN
[2] DailyMed. Lurbinectedin. Retrieved from https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=632bb50c-3bcb-4c85-9056-fc33410550ae
[3] Mayo Clinic. Lurbinectedin (Intravenous Route) - Side Effects. Retrieved from https://www.mayoclinic.org/drugs-supplements/lurbinectedin-intravenous-route/side-effects/drg-20490804?p=1