You should call your doctor and let him/her know this, as they may need to increase your dosage.
In the mean time, avoid sitting for long periods of time, try to keep your feel elevated as much as possible. Avoid high sodium foods (look at the packages of foods for sodium content) Avoid soda pop, drink more water, which can help flush your system. You can also try applying a cool compress on the ankles as this hot weather can cause vessels to dilate. Also you may want to purchase a pair of compression/circulation stockings, as this will help to compress the fluid back into the veins.
But most important, do let your doctor know the medication you are taking is not working.
Best of luck, Hope this helps, If you need anything else please feel free to ask. If you found this helpful don’t forget to click the *ACCEPT* button and leave *POSITIVE* feedback.