Giardiasis
Giardiasis develops when the intestine is infected by Giardia lamblia, a microscopic parasite. It spreads via contaminated food and water. The infection can be symptomless, and those who become unwell may have lasting gut upset and tiredness. Treatment can clear the infection, but symptoms may last for weeks.
Medicines used to treat Giardiasis
Metronidazole
200 · 400mg
Metronidazole tablets contain metronidazole, with the price shown per tablet, in several strengths and pack sizes. They are used for bacterial vaginosis, trichomoniasis, giardiasis and protozoal infection.
Tinidazole
500mg
Tinidazole is a tablet for giardiasis, trichomoniasis and anaerobic bacterial infections. It comes in a single strength; pack sizes vary. Each option lists its price per tablet.
Key points
- It is one of the most widespread gut parasite infections globally, especially where food is prepared with untreated water.
- Symptoms often last weeks rather than days, unlike typical bacterial food poisoning.
- A single dose of one antiparasitic or a short course of another can clear the infection.
Symptoms
The infection can cause persistent, greasy diarrhoea that floats. Bloating, stomach cramps, nausea and excessive wind may also occur.
Treatment
Giardiasis responds well to antiparasitic medicines. Tinidazole is commonly supplied as a single dose; Tinidazole tablets contain 500mg tinidazole. Ornidazole may be taken over a short course. Albendazole is a broader antiparasitic, sometimes used when tinidazole-class treatment is not available; Albenza tablets contain 400mg albendazole. Metronidazole is also used; Metronidazole tablets contain 200mg or 400mg metronidazole. Good fluid intake supports recovery, particularly after long-lasting diarrhoea. Pharmacy partners in India ship to Malaysia in discreet packaging.
When to seek medical advice
Arrange prompt medical review if symptoms remain after a full treatment course, or if there is blood in stools or a high fever.
Further reading
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