Compassionate advice your specialist before taking any medication. Tasteless name: Bisoprolol fumarate, Hydrochlorothiazide Brand names: Ziac (Spanish name, Biconcor) Why is Ziac embraced? Ziac is used to treat hypertension. It joins a beta-blocker (bisoprolol) with a thiazide diuretic (hydrochlorothiazide). Beta-blockers lessen the force and rate of heart withdrawals, in this way cutting down circulatory strain. Diuretics help your body convey and take out more pee, which also helps lower beat. Ziac may similarly be used for purposes other than those recorded in this pharmaceutical assistant.