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.