Hi, welcome to our site. I am Dr Saumya Mittal, MD. Read your query. That is a very significant question and i appreciate your problem. I will try my best to answer your query I will go one by one as per your symptom and suggest a possible explanation and a solution 1, dry cough- this is possibly due to the intake of the medicine Capoten- this is basically a captopril and is very regularly known to cause dry cough. changing it to another medicine like olmesartan may reduce the cough or cure it all together. 2. increased urination- you are on the tablet lasilactone. this is a diuretic and therefore an increased volume and frequency of urination is expected. 3. irregular heart beat- both the above drugs retain potassium in the body. now an increased potassium levels in the body is known to cause arrhythmias espeacially bradycardia. it may be a good idea to check potassium levels specifically and kidney function in general tested in view of the mentioned possibility I hope this helps you. Inform the reports mentioned above/if any other so I can be of help further. Best of luck. I have given you the answer to the maximum considering the information provided. The results of the tests could further enhance my answer to you. Please do understand that some details could be extracted from a detailed history and examination. Please feel free to ask another query. I would be glad to help you. Looking forward to your return query with the details asked so that I can help you further. (If the answer has helped you, please indicate this)