Bowel cleansing before a colonoscopy

The plan usually combines temporary food changes, clear fluids and a laxative solution. Instructions differ between products and appointment times, so use the schedule supplied by your endoscopy service rather than a generic online plan.

Stool can hide the bowel lining, small polyps or areas that need closer inspection. Effective preparation helps the clinician view the lining and carry out planned procedures, such as taking a tissue sample or removing a polyp. If the view is inadequate, parts of the examination may need to be repeated on another day.

Frequent watery bowel movements are an expected effect of the preparation. Cramping, bloating, nausea and irritation around the anus can also occur. The final output becoming watery and lighter in colour can indicate that the cleanser is working, but the service's instructions remain the guide.

Read the instructions early enough to buy permitted drinks and arrange easy access to a toilet. Take each portion at the stated time and keep drinking the allowed clear fluids as directed. Chilling the solution or drinking it through a straw may make the taste easier to manage if the product instructions allow this.

Check medication instructions with the endoscopy team, especially for diabetes medicines, blood thinners, iron tablets or medicines affected by rapid bowel emptying. Do not stop prescribed treatment without specific advice. Tell the team about kidney or heart problems, pregnancy, difficulty swallowing, a previous reaction to bowel preparation, or persistent constipation.

Use a barrier cream around the anus before bowel movements become frequent, pat rather than rub when cleaning, and remain near a toilet. Stop all food and drink at the exact cut-off time provided for your procedure and sedation plan.

Contact the endoscopy service promptly if you cannot keep the preparation down, have not started passing stool after taking it as instructed, accidentally eat after the cut-off, or cannot finish the solution. The team can advise whether to adjust, delay or repeat any part of the plan.

Seek urgent medical help for severe or worsening abdominal pain, a swollen rigid abdomen, fainting, confusion, very little urine, repeated vomiting, breathing difficulty or swelling of the face, lips or tongue. These are not symptoms to manage by simply taking more preparation.

Confirm which foods and drinks are permitted, when each portion begins, and when all intake must stop. Ask how to manage your regular medicines and what number to call outside clinic hours. If you struggled with preparation before, describe whether taste, nausea, constipation or the volume was the main barrier so the team can consider an appropriate plan.