Allergic-type reactions. Patients w/ fluid & electrolyte disturbances eg, hyponatremia, hypokalemia; at risk of potential complications eg, altered renal function, cardiac insufficiency or treated concomitantly w/ diuretics. Risk of aspiration pneumonia in patients w/ regurgitation tendencies, bedridden or altered neurological function &/or motor disorder; acute pulmonary oedema in patients w/ cardiac or renal insufficiency; ischaemic colitis or concomitant use of stimulant laxatives eg, bisacodyl or Na picosulfate. Patients w/ strict low-salt diet. Correct electrolyte abnormalities prior to administration. Pregnancy & lactation. Childn <18 yr. Elderly patients in frail general condition.