Ethacrynic acid has the listed side effects of possibly causing GI irritation, diarrhea, anorexia, abdominal pain, and dysphagia (difficulty swallowing) but does say how frequent these side
effects are but side
effects are usually mild
and not very common (usually less than 10%). Lasix (Furosemide) has the listed side effects of possibly causing anorexia, constipation, cramping, diarrhea, nausea, oral and gastric irritation, and vomiting and again does not list the frequency.