Hi, I have gone through your question and understand your concerns. Lisinopril (ACEi drug) can cause Blurred vision,cloudy urine,confusion,decrease in urine output or decrease in urine-concentrating ability,dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position unusual tiredness or weakness. Weakness and lightheadedness usually goes away after few days , this is the reason this drug is prescribed in low doses initially and than dose is increases after few days. Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate to ask. I will be happy to answer your questions. Wishing you good health.