Racecadotril Dosing Interval
Racecadotril 100 mg should be taken every 8 hours (three times daily).
Dosing Regimen
The standard dosing for racecadotril in adults with acute diarrhea is:
- 100 mg three times daily (every 8 hours)
- Continue until recovery, defined as two consecutive normal stools or no stool production for 12 hours 1, 2, 3
Clinical Context
Racecadotril is an enkephalinase inhibitor that works through an antisecretory mechanism, reducing water and electrolyte secretion in the small intestine without affecting intestinal motility 4. This distinguishes it from antimotility agents like loperamide.
Key Evidence Supporting This Dosing
Multiple high-quality randomized controlled trials consistently used the 100 mg three times daily regimen:
- A large multinational study of 945 patients demonstrated that racecadotril 100 mg three times daily resolved diarrhea rapidly (median 55 hours) with significantly less constipation than loperamide (16% vs 25%, p=0.001) 1
- In elderly patients, this dosing achieved normal stools in 36±4 hours, significantly faster than loperamide (63±6 hours, p<0.01) 5
Important Considerations
Duration of treatment: Continue until clinical recovery occurs, typically within 24-48 hours. Do not extend beyond what is necessary for symptom resolution 1, 2.
Guideline context: While the 2017 IDSA guidelines note that racecadotril reduces stool volume, they also mention it is not available in North America 6. However, where available, the evidence strongly supports its use as an adjuvant to oral rehydration therapy.
Advantages over alternatives: Racecadotril produces significantly less rebound constipation compared to loperamide (9.8% vs 18.7%) and has a lower overall adverse event rate (14.2% vs 23.9%, p=0.001) 1.