The most common side effects when taking Kivexa (seen in between 1 and 10 patients in 100) are hypersensitivity (allergic reactions), rash, nausea (feeling sick), vomiting, diarrhoea, abdominal (tummy) pain, headache, arthralgia (joint pain), muscle disorders, cough, nasal symptoms, fever, lethargy, fatigue (tiredness), insomnia (difficulty sleeping), malaise (feeling unwell), anorexia (loss of appetite) and alopecia (hair loss).