Management of Constipation in Individuals with Alcohol Use Disorder

Primary Recommendations

The American Gastroenterological Association and American College of Gastroenterology provide a strong recommendation for polyethylene glycol (PEG) over no treatment in adults with chronic idiopathic constipation, with moderate certainty of evidence 1
PEG is the best laxative choice for constipation in individuals with alcohol use disorder, based on its strong efficacy, excellent safety profile, and lack of electrolyte disturbances—a critical consideration in this population prone to metabolic derangements 1
The American Gastroenterological Association recommends starting PEG 17 g once daily mixed in 8 oz of liquid, titrating based on response 1, 3

Magnesium oxide and magnesium hydroxide should be used with extreme caution or avoided entirely in alcoholic patients due to the high risk of hypermagnesemia, particularly given the frequent presence of renal impairment in this population 2, 3, 5
Lactulose (15 g daily, titrated as needed) is a reasonable alternative to PEG, although it may cause bloating and flatulence, especially at higher doses 3, 6

The initial assessment should include ruling out fecal impaction and bowel obstruction, and assessing for other causes of constipation such as medications, hypothyroidism, hypercalcemia, and hypokalemia 7, 8
The goal of treatment is to achieve one non-forced bowel movement every 1-2 days, with adequate fluid intake critical in alcoholic patients who may be dehydrated 1, 7, 9
If there is an inadequate response to PEG, the dose can be increased or a stimulant laxative such as bisacodyl or senna can be added 1, 3, 7, 8

Prophylactic laxative therapy is mandatory from day one of opioid initiation in patients with alcohol use disorder, with the combination of PEG and a stimulant laxative recommended for opioid-induced constipation 2, 5, 9, 10
Monitor renal function before using any magnesium-containing products, as chronic alcohol use frequently causes renal impairment and magnesium accumulation can lead to serious toxicity 2, 5
Ensure adequate hydration before initiating any laxative therapy, as alcoholic patients are often volume-depleted and osmotic laxatives require sufficient fluid intake to work effectively 1