I too had swollen feet and ankles. I was taking HCTZ, Telmisartan,and Amlodipine. After a Google search of these BP medications, I found that edema was often a side effect of Amlodipine. There are two categories of Calcium Channel Blockers: the dihydropyridines ( Amlodipine and Nifedipine ,) and the non-dihydropyridines( Diltiazem and Verapamil). The former are more likely to cause edema. After discussion with my cardiologist, My medication was changed from Amlodipine to Diltiazem. I no longer have the edema.