MedicinePOM

Nalidixic Acid

Older oral antibiotic once used for resistant dysentery.

Clinical information

Common uses

Shigella dysentery resistant to other antibiotics (historic)

Cautions

largely obsolete — removed from the WHO essential medicines list

Reference information, not medical advice — always follow your doctor or pharmacist. Source: WHO Model List of Essential Medicines, list.essentialmeds.org, nalidixic acid (accessed 2026-08-16)

Approved brands & formulations5

Brand name	Dosage form	Strength	Importer	Category
Gramoneg	Oral Liquid	300mg/5ml 30ml,60 ml	authorized medicine importers	POM
Gramoneg	Tablet	500mg	authorized medicine importers	POM
Nalidixic Acid	Oral Liquid	300mg/5ml	—	POM
Nalidixic Acid	Tablet	500mg	—	POM
Wintomylon	Tablet	500 mg	authorized medicine importers	POM