Situation: A 32-year-old woman with ulcerative colitis is admitted for a flare. She has 8 bloody stools a day, a temperature of 38.2 °C, a heart rate of 104/min, and a hemoglobin of 9.8 g/dL (98 g/L). Stool tests for Clostridioides difficile and other pathogens are pending. The provider writes the following orders. Which order should the nurse question?

In acute severe ulcerative colitis, antidiarrheals, opioids, and anticholinergics are avoided because they can precipitate toxic megacolon. Intravenous corticosteroids are first-line therapy, and heparin prophylaxis is given because the clotting risk outweighs the bleeding concern in most clients. Potassium replacement corrects losses from diarrhea.

Clinical context Acute severe ulcerative colitis (ASUC) is a life-threatening gastroenterological emergency. The patient’s presentation — 8 bloody stools daily, fever 38.2 °C, tachycardia 104/min, and anemia with hemoglobin 9.8 g/dL — meets criteria for a severe flare requiring prompt, protocol-driven management. Among the four orders, only loperamide should be questioned.

Why loperamide is contraindicated Loperamide is an opioid-receptor agonist that reduces intestinal motility. In ASUC, slowing peristalsis does not treat the underlying mucosal inflammation; instead, it prolongs contact between the inflamed colonic wall and luminal contents, increases intraluminal pressure, and can precipitate colonic dilatation. Antidiarrheals, opioids, and anticholinergics are avoided in acute severe ulcerative colitis because they can precipitate toxic megacolon, a potentially fatal complication. Watch out! The presence of bloody diarrhea does not justify symptomatic suppression with antimotility agents. The diarrhea is a consequence of mucosal destruction and inflammatory exudate, not a primary motility disorder. Suppressing it masks clinical deterioration and delays recognition of worsening colitis.

Why the other orders are appropriate Intravenous methylprednisolone 60 mg every 24 hours is first-line therapy for ASUC. Corticosteroids rapidly reduce mucosal inflammation and are the standard initial medical intervention. Early identification of patients at risk of corticosteroid failure is critical for timely therapeutic escalation, which is why the patient must be monitored closely for response over the first 3–5 days ^[1]. If steroids fail, rescue therapy or colectomy is considered ^[2].

Heparin 5,000 units subcutaneously every 8 hours is venous thromboembolism (VTE) prophylaxis. Patients with active inflammatory bowel disease have a substantially increased clotting risk due to systemic inflammation, dehydration, and immobility. In most clients with ASUC, the thrombotic risk outweighs the concern for worsening gastrointestinal bleeding, so pharmacologic VTE prophylaxis is indicated. The hemoglobin of 9.8 g/dL reflects chronic or subacute blood loss and is not a contraindication to prophylactic-dose heparin in the absence of hemodynamic instability or active exsanguination.

Potassium chloride 20 mEq per liter of intravenous fluid addresses the large intestinal potassium losses from frequent bloody diarrhea. Hypokalemia can worsen colonic smooth muscle dysfunction and contribute to ileus or toxic megacolon, so replacement is a standard supportive measure.

Infectious workup and diagnostic caution Stool tests for Clostridioides difficile and other pathogens are pending. In patients with suspected or confirmed infectious diarrhea, antimotility agents are also discouraged because they can prolong pathogen exposure and worsen outcomes . Although this patient’s primary diagnosis is ulcerative colitis, the same principle applies: until infection is excluded, suppressing diarrhea is unsafe. The overlapping concern reinforces that loperamide is the order to question.

Key comparison for the licensure exam

Order	Rationale in ASUC	Nursing action
Methylprednisolone IV	First-line anti-inflammatory therapy; reduces mucosal inflammation	Administer as prescribed; monitor for response and hyperglycemia
Heparin SC	VTE prophylaxis; clotting risk exceeds bleeding risk	Administer; monitor for bleeding and injection-site bruising
Loperamide PO	Antimotility agent; may precipitate toxic megacolon	Question the order; do not administer
Potassium chloride IV	Replaces potassium lost through diarrhea	Administer; monitor serum potassium and cardiac rhythm

Key point! The single most dangerous order in an acute severe ulcerative colitis flare is an antidiarrheal, opioid, or anticholinergic. These drugs increase the risk of toxic megacolon by reducing colonic motility while inflammation remains active. Intravenous corticosteroids remain the cornerstone of initial medical management, and the patient must be reassessed early for signs of steroid failure ^[1][2].