Recently prescribed Losartan potassium 50 mg. Already taking Atenolol /Chlorthal 50/25 for high bp. Also taking Potassium CL ER 20meq 2x day. Also Metformin for Type 2 Diabetis. My BP is well under control and also have no symptoms of kidney damage. Immediately started with Diarrhea after starting Losartan and it stopped when I stopped taking Losartan. Is this medication really necessary for bp and kidney health? Too much potassium?