Amoxicillin capsules are non-toxic if taken correctly. Oral amoxicillin capsules may appear some adverse manifestations, such as nausea and vomiting, as well as diarrhea and pseudomembranous enteritis and other gastrointestinal reactions. There may also be skin rashes, asthma and other allergic manifestations. Amoxicillin capsules can cause anemia or eosinophilia and other manifestations. Some patients occasionally have excitement, insomnia, anxiety and dizziness and other central nervous system manifestations.