I have been a fluid retainer all my life. Doctor changed me from dyazide to lisinopril and now my legs are retaining fluid. Should I expect him to find another bp med? It works fine for my bp and only side affect is a light cough. Is this better than dyazide for me? My blood pressure was marginal, not too high but he wanted to change the med for some reason, he wanted the bottom number lower than 80. I am a 70 year old female.