De hyppigst observerede bivirkninger, som var væsentligt hyppigere hos lenalidomid/ dexamethason - gruppen sammenlignet med placebo/ dexamethason- gruppen, var: neutropeni (39, 4%), træthed (27, 2%), asteni (17, 6%), forstoppelse (23, 5%), muskelkrampe (20, 1%), trombocytopeni (18, 4%), anæmi (17, 0%), diarré (14, 2%) og udslæt (10, 2%).
The most frequently observed adverse reactions which occurred significantly more frequently in the lenalidomide/dexamethasone group compared to the placebo/dexamethasone group were neutropenia (39.4%), fatigue (27.2%), asthenia (17.6%), constipation (23.5%), muscle cramp (20.1%), thrombocytopenia (18.4%), anaemia (17.0%), diarrhoea (14.2%) and rash (10.2%).