To define the prevalence and clinical presentation of pellagra, a multi-systemic disease caused by the deficiency of niacin, in patients admitted to a tertiary addiction treatment centre in southern India, with alcohol dependence syndrome (ADS)-(ICD10).Review of the health records of 2947 patients who received inpatient care for ADS between 2015 and 2017.Out of 2947, 31 (1%) were diagnosed with pellagra. Nearly two-thirds (64.5%) of those with pellagra were from a low-income group. Of the clinical-triad of pellagra, all patients had dermatitis, more than half (58%) had delirium, a minority (19%) had diarrhoea. Nearly two-thirds (61%) had presented in a complicated-withdrawal state. Associated conditions included peripheral neuropathy (32%); Wernicke's encephalopathy (26%); seizures (16%).Seventeen (54%) had BMI <18.5 kg/m2. Treatment was a high dose of parenteral vitamins including niacin (mean dose: 1500 mg/day) for an average of 7.5 days followed by oral multivitamin supplements. All had complete resolution of pellagrous symptoms by the end of the three weeks of inpatient care.Pellagra is an acute medical condition, frequently encountered in the context of alcohol dependence and poverty. It often presents with other disabling and life-threatening comorbidities like delirium tremens and Wernicke's encephalopathy. The classical triad of pellagra is only seen in a minority of cases. Thus a high index of suspicion is required lest pellagra may remain undiagnosed. Prompt identification and treatment with a high dose of niacin in combination with other vitamins result in complete recovery.
