 [ Symptoms ] does your upper backlung area hurt badly with plural effusion  for 3 days now my mid back where my lungs are hurt something awful when i try to move whether it be rolling over in bed or standing up from a chair i have a cough when i lie down so i use my athma inhaler and cough syrup to try to relieve the cough so i can sleep i have been taking ibuprofen for the lung pain but it does not help today i have an icy hot patch on the middle of my back can not say it helps but it does not make things worse [ Disease ] if you have a true allergy to sulfa medications then lasix may not be for you it does contain sulfa product if you have difficulty breathing or your airways feel like they are closing off or a rash has developed specifically on the trunk of the body then you should stop taking this medication immediately and consult with your pharmacist and health care provider it is important to differentiate between allergies to medications and side effects if you have experienced intolerable side effects to medications containing sulfa products that does not mean you are allergic work with you local pharmacist and physician to re evaluate this situation and to make sure you are taking medication that is appropriate for you