Medications can treat diseases of the organism, but the allergic reactivity to them varies according to the different constitution of each person. Amoxicillin is a very common penicillin antibiotic, but it is also one of the most common allergic drugs. When an allergy to amoxicillin occurs there are several reactions as follows. The most common allergic reactions are gastrointestinal reactions, in which the body may experience diarrhea, nausea, vomiting and so on. When these reactions occur, it is important to eat a light diet and avoid stimulation by spicy foods. You can also take some liquid salts orally to keep the body hydrated, and if the condition is serious, you should seek immediate medical attention. Allergic reactions also include reactions to the skin. For example, skin rashes, pockmarks, etc. These symptoms can be treated with anti-inflammatory drugs, and if the symptoms are severe, immediate medical attention should be sought. Amoxicillin can also cause some abnormalities in the central nervous system, such as insomnia, dizziness, anxiety, and excitement, etc. If these symptoms occur, the drug should be stopped immediately. Amoxicillin can cause shock and asphyxia in the most severe cases. When amoxicillin causes allergic reaction to the body, the cause of the disease should be clarified and treatment should be taken immediately according to the severity of the disease.