De mest almindelige bivirkninger (> 25%) undervejs i behandlingen med lapatinib plus capecitabine var gastro- intestinale (diarre, kvalme og opkastning) eller dermatologiske (palmo- plantar erytrodysæstesi (PPE) samt udslæt).
The most common adverse reactions (> 25%) during therapy with lapatinib plus capecitabine were gastrointestinal (diarrhoea, nausea, and vomiting) or dermatologic (palmar-plantar erythrodysesthesia [PPE] and rash).