Doxazosin er givet sammen med thiazid- diuretikum, furosemid, betablokerende midler, antibiotika, oral antidiabetikum, urikosuriske midler eller antikoagulerende midler uden bivirkninger.
9/ 24 together with thiazide diuretics, furosemide, beta-blocking agents, antibiotics, oral hypoglycaemic agents, uricosuric agents, or anticoagulants without adverse drug interactions.