Related guidance:

Diarrhoea – adult’s assessment (NICE CKS June 2023)

Avoid anti-motility agents in children. See below for assessment of dehydration in under 5s: Diarrhoea and vomiting caused by gastroenteritis in under 5s: diagnosis and management NICE CG84 April 2009)

See NHS Somerset formulary Useful links for NHS Somerset sick day rules.

See NHS Somerset formulary Fluid and Electrolyte imbalances for Oral rehydration therapy.

For codeine see NHS Somerset Formulary Pain

Therapeutic AreaFormulary ChoicesCost for 28
(unless otherwise stated)
Rationale for decision / comments
AntidiarrhoealsGreen crossLoperamide - suitable for self-care2mg capsule: £0.90 (30)



Symptomatic treatment of acute diarrhoea.

Adult: initially 4 mg, followed by 2 mg for up to 5 days, dose to be taken after each loose stool; usual dose 6–8 mg daily; maximum 16 mg per day.
2mg orodispersible tablet sugar free: £1.02 (6)