According to the sources provided, there is no information on the prevalence or incidence of lurbinectedin allergy. Lurbinectedin is a chemotherapy drug used to treat certain types of cancer, and like any medication, it may cause allergic reactions in some people. However, the sources do not provide any data on the frequency of such reactions. It is important to note that any signs of an allergic reaction, such as difficulty breathing, hives, or swelling of the face or throat, should be reported immediately to a healthcare provider. Patients should also inform their doctor if they have a history of allergies or other medical conditions before starting treatment with lurbinectedin [2][3].

Sources:
[2] https://my.clevelandclinic.org/health/drugs/23890-lurbinectedin-injection
[3] https://www.mskcc.org/cancer-care/patient-education/medications/lurbinectedin