5 hydrochlorothiazide and 100mg of losartan potassium (Cozzar). It is said the contradict each other. I heard hydrochlorothiazide can cause ED while losartan potassium can actually improve it. I notice when I watch porn I get erection altough without stimulation I cannot no longer maintain it for few minutes. It goes flat very fast (under 1 minute) if I stop.