My husband had the same problem although he was on a little higher dose than you.
our docotr may or may not want to put you on a diuretic-they can cause problems too.
You should avoid salt/sodium in your diet. Check the labels--sometimes you will be very surprised how much sodium is in certain foods.
Kepp your feet elevated as much as possible--even when you are sitting down.
Wear compression hose (I think you can get them at some pharmacies)
Although it seems counter-intuitive-drink plenty of water to flush out your body. If your are dehydrated your body holds onto the extra fluid.