CTCAE grading of constipation:
Grade 1: Occasional or intermittent symptoms; occasional use of stool softeners, laxatives, dietary modification, or enema
Grade 2: Persistent symptoms with regular use of laxatives or enemas; limiting instrumental ADLs
Grade 3: Constipation with manual evacuation indicated; limiting self-care ADLs
Grade 4: Life-threatening consequences; urgent intervention indicated
Characterize the symptom (onset, pace)
Ask the patient:
Have you had any GI problems in the past? Is this a new or worsening symptom? When did it start or get worse? Has it developed gradually or suddenly? Have you recently started any new medications, OTCs, supplements, or marijuana? What have you done or taken thus far for the constipation?
Note: Review of medications is important here—opioids, etc.
Grade the symptom
Ask the patient:
How frequently do you have bowel movements (now vs normally)? When was the last time you had a bowel movement? Are you taking anything for the constipation? How much fluid are you drinking per day? Is the constipation interfering with your eating or any of your daily activities? Is there any blood in your stools?
Ask the patient:
Do you have a fever? Are you in pain? Have you been nauseated/throwing up?
Consider the following in individualizing the intervention: Is the patient a good or poor historian? Any language barriers or cognitive deficits? Is the patient reliable (able to carry out treatment recommendations)? Does this patient have alcohol/substance abuse issues? Does the patient have transportation? Is there sufficient caregiver support?
Patients with new onset moderate or worse (or worsening) constipation should be seen.
Patients with any red-flag symptoms should be seen immediately.
What do you suspect is the cause of the constipation?