Informational only — Not medical advice. Always consult a licensed healthcare provider.

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Other brands with the same active ingredient

These brands contain the same active ingredient (Nalidixic Acid). Strength and form may differ — confirm substitution with your doctor or pharmacist before switching.

Indications & Uses

Utin is indicated for:

Dosage Reference

Reference Information Only

Dosages shown are general references from official sources. Always consult your doctor or pharmacist for personalized dosing.

Adults:

Adults: Initially, 1 g every 6 hours for 7 days, then reduced to 500 mg every 6 hours. Children: For infants and children aged 3 months and over, the initial dose is 13.75 mg per kg of body weight by mouth every six hours for one or two weeks. The maintenance dose is 8.25 mg per kg of body weight by mouth every six hours, or as prescribed by the physician.

Side Effects

Gastro-intestinal disturbances such as nausea, vomiting and diarrhoea may occur. Haemolysis can develop in people with G6PD deficiency. Allergic reactions may include urticaria, rashes, fever, arthralgia and eosinophilia. Other possible side effects are myalgia, muscle weakness, phototoxicity, jaundice, visual disturbances and convulsions.

Cautions & Contraindications

Warnings & Precautions

The benefits and risks should be weighed carefully before use during the first trimester of pregnancy, while breastfeeding, and in patients with impaired kidney or liver function.

Contraindications

Nalidixic acid should not be used in infants under 3 months of age, in people with epilepsy, or in those with CNS (central nervous system) lesions.

Drug Interactions

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Last updated: 15 Aug 2026