In studies, the most common side effects with Evoltra (seen in more than 1 patient in 10) were febrile neutropenia (low white blood cell counts with fever), anxiety, headache, flushing (reddening of the face), vomiting, diarrhoea, nausea (feeling sick), dermatitis (inflammation of the skin), pruritus (itching), pyrexia (fever), mucosal inflammation (inflammation of the moist body surfaces, such as the lining of the mouth) and fatigue (tiredness).