Do diuretics used for cfh lead to thirst?

Yes: Yes, thirst is one of the main side effects of using diuretics. Diuretics cause you to lost more water and salt through the urine. That water is coming from the blood, so in effect you are losing some blood volume. This is great for CHF but lower blood volume is one of the triggers for thirst.

No: The diuretics don't lead to thirst. Thirst is caused by vasopressin - a hormone that is activated in heart failure. Thirst often interferes with the recommendations of keeping fluid intake to less than 1.5 - 2 liters per day.