Medications that lower blood pressure can sometimes cause dizziness, especially when getting up too quickly from a chair or bed, when feeling very tired, or if you have skipped a meal or are dehydrated. It is important that these symptoms do not happen frequently, as it could indicate a problem. If you measure your blood pressure at home, make sure to take multiple readings in the morning and evening over several days to assess the effectiveness of your treatment. If your symptoms persist, it would be best to consult with a healthcare professional for further evaluation.