Alcohol: Thiamine and or Magnesium 1

This is a 3- arm randomised, open label, controlled study in a cohort of alcoholic patients admitted through A\&E. Patients will be randomised to concurrent infusion of one of the following: * Arm 1: IV thiamine * Arm 2: IV magnesium sulphate followed by delayed IV thiamine * Arm 3: IV thiamine and IV magnesium sulphate Thiamine will be administered as IV Pabrinex, a compound preparation which also contains B vitamins and vitamin C. Administration of IV Pabrinex is standard care in this patient group and magnesium sulphate is routinely co-administered at Glasgow Royal Infirmary.