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Loperamide is used for short-term diarrhoea.
What should I know about Loperamide?
Follow the label, and do not give it to children unless a doctor has prescribed it. Drink plenty of fluids.
What are the side effects?
Constipation, nausea, headaches and wind can occur. Stop taking it if you become constipated.
Who should check first?
Do not take it for severe diarrhoea after antibiotics, a flare-up of ulcerative colitis, or if you are constipated or have a swollen stomach. Talk to your doctor if diarrhoea lasts more than 48 hours, or if you have blood in your stools with a fever, liver problems, or are pregnant or breastfeeding.
When should I get help?
Stop and seek urgent help if you feel faint, pass out, have severe stomach pain with fever, or have trouble urinating. Call your local emergency number (000 in Australia) for swelling of the throat or tongue, or trouble breathing.
Doses vary, so follow your prescriber, pharmacist and the medicine label. In Australia, call 000 in an emergency. Outside Australia, use your local emergency number.
Source: NHS: Who can and cannot take loperamide and NHS: Side effects of loperamide. General education does not replace individual medical advice. Updated November 2026.
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