Constipation according to Rome III: a diagnosis of functional constipation is made when at least two of the following criteria are met for the last 3 months with symptom onset at least 6 months prior to diagnosis: a) straining on >25% of defecations; b) lumpy or hard stools on >25% of defecations; c) sensation of incomplete evacuation on >25% of defecations; d) sensation of anorectal obstruction/blockage on >25% of defecations; e) manual maneuvers on >25% of defecations; and f) less than 3 defecations per week.

Patients who require to follow a diet with low sodium content defined as patients that suffer from a condition or take medication associated with a diet low or absent of sodium:

Right or congestive heart failure, Acute kidney failure, Chronic renal failure, Nephrotic syndrome, Edematogenic glomerulonephritis, Diabetic nephropathy, Nephrolithiasis, Arterial hypertension, Ascites, Hepatic cirrhosis, Prolonged treatments (more than 6 months) with corticosteroids

Constipation according to Rome III: a diagnosis of functional constipation is made when at least two of the following criteria are met for the last 3 months with symptom onset at least 6 months prior to diagnosis: a) straining on >25% of defecations; b) lumpy or hard stools on >25% of defecations; c) sensation of incomplete evacuation on >25% of defecations; d) sensation of anorectal obstruction/blockage on >25% of defecations; e) manual maneuvers on >25% of defecations; and f) less than 3 defecations per week.

Patients who require to follow a diet with low sodium content defined as patients that suffer from a condition or take medication associated with a diet low or absent of sodium:

Right or congestive heart failure, Acute kidney failure, Chronic renal failure, Nephrotic syndrome, Edematogenic glomerulonephritis, Diabetic nephropathy, Nephrolithiasis, Arterial hypertension, Ascites, Hepatic cirrhosis, Prolonged treatments (more than 6 months) with corticosteroids

Patients that suffer from a condition or take medication associated with a diet low or absent of sodium:

Right or congestive heart failure, Acute kidney failure, Chronic renal failure, Nephrotic syndrome, Edematogenic glomerulonephritis, Diabetic nephropathy, Nephrolithiasis, Arterial hypertension, Ascites, Hepatic cirrhosis, Prolonged treatments (more than 6 months) with corticosteroids

Description of patients who suffer from a condition or take a medication associated with a low or no sodium diet, patients with a low sodium diet recommendation, patients with constipation, patients taking laxatives: Data demographics, anthropometric data, diseases associated with a low sodium diet, constipation, laxatives and concomitant medication. In terms of their demographics and clinical characteristics.