Although most people tolerate enalapril well, there are some potential side effects of the medication, such as nausea, body weakness, and dizziness. In many cases, enalapril side effects are minor and may be easily treated by you or your healthcare provider. However, there are several side effects of enalapril that you should report immediately to your healthcare provider, including any unexplained swelling of the head or neck, difficulty breathing or swallowing, and a decrease in urine output.