Management of Tirzepatide‑Induced Diarrhea

Safety Assessment Before Antidiarrheal Use

Adults with drug‑induced diarrhea should have no fever > 38.5 °C, as fever suggests an invasive pathogen or systemic illness【1】.
No visible blood in the stool is required because bloody diarrhea indicates an inflammatory process that contraindicates antimotility agents【1】.
Absence of severe abdominal cramping is necessary, since intense cramping may herald complicated diarrhea【1】.
Patients must be adequately hydrated before starting any antidiarrheal medication【1】.
Age ≥ 18 years is a prerequisite; antidiarrheals are not recommended for children with acute diarrhea【3】.

Loperamide is the recommended first‑line antidiarrheal for acute watery diarrhea in adults who meet the safety criteria above【1】.
Dosing: 4 mg initial dose, then 2 mg after each subsequent loose stool, not to exceed 16 mg in 24 hours【2】.
Discontinuation: Stop the drug 12 hours after the patient becomes diarrhea‑free【2】.

Racecadotril is not FDA‑approved in the United States but is widely available in Europe, Asia, Africa, and Latin America【5】.

Maintain adequate fluid intake guided by thirst, using glucose‑containing beverages (e.g., fruit juices, lemonades) or electrolyte‑rich soups【1】.
Oral rehydration solutions are not essential for otherwise healthy adults with mild diarrhea if sufficient hydration is maintained【1】.
Antidiarrheals are adjunctive and do not replace the need for fluid replacement【3】.

No clinical improvement within 48 hours of initiating therapy warrants stopping the antidiarrheal and seeking medical advice【1】.
Development of fever, bloody stools, or worsening symptoms requires immediate discontinuation and medical evaluation【1】.
Onset of severe abdominal cramping or abdominal distension should prompt cessation of the antidiarrheal and prompt referral【1】.
Signs of dehydration (e.g., orthostatic dizziness, reduced urine output, marked weakness) necessitate stopping the antidiarrheal and urgent medical assessment【4】.

The recommendations apply only to uncomplicated drug‑induced diarrhea; patients with concurrent infection, inflammatory bowel disease, or other complicating conditions need a different management approach【1】【3】.