We do not ignore them cem, we just make sure that we monitor patients adequately to ensure they are safe. All drugs have side effects. Name one without and I will be your slave for life.
The diuretic doesn't make you thirsty. It doesn't work like that. The reason its used is due to an increase in fluid retention and this causing symptoms. The way it works is by dilating the venous compartment of the body so as to relieve the pre-load pressure on the right side of the heart. This helps improve breathlessness. Then it makes you loose fluid hence reducing the volume within the blood vessels. But in the patient population that we us it in, they have fluid retention in the space between the cells(lungs, gut, ankles, face etc). This volume loss then draws fluid out from this space under oncotic pressure to refill the volume within the blood vessels. Hence getting rid of unnecessary fluid that is in fact causing damage and symptoms like breathlessness. In addition to this patients often have to be restricted to a certain amount of fluid intake per day depending on the severity of water retention. So it is not as simple as prescribe a dose and forget it. It is more a clinical decision based on a patients clinical status. In addition, in England, most patients on diuretics will receive education as to how to monitor this fluid loss at home and what to do if it is too much or too little. Plus blood tests on a routine basis. The other diuretics available in this country are often stronger and have more side effects than frusemide. There really isn't an other weaker but better diuretic option. Feel free to name an alternative that you may think works better. Hope that helps.