My mother is taking Lisinopril for high blood pressure. She was going to have a shot in her leg today but her leg was so full of fluid the doctor said she needed to take Furosemide. She said she had some at home and would take it. I checked and it looks like these two drugs should not be taken together. I think a pharmacy would have picked that up - not sure why the doctor didn t as she thought she let him know what drugs she takes but maybe she didn t. She feels okay right now but will the reaction become serious enough that she would be wise to contact her G. P. now?