Neurology
17 Topics Cardiology
23 Topics ENT
22 Topics Opthalmology
24 Topics Respiratory
11 Topics Gastroenterology
28 Topics Psychiatry
11 Topics Musculoskeletal
22 Topics Orthopaedic
14 Topics Miscellaneous
18 Topics Paediatrics
43 Topics Endocrinology
40 Topics Rheumatology
13 Topics Gynaecology
31 Topics Dermatology
46 Topics Renal medicine
15 Topics Heamatology
22 Topics Differential diagnosis
50 Topics 
Hyponatremia
Hyponatremia
Low serum sodium (<135mmol/L)
Causes
Diuretic excess— especially thiazides
Renal failure
Nephrotic syndrome
Diarrhoea/vomiting
Small bowel obstruction
SIADH
Water overload (e.g. polydipsia)
Severe hypothyroidism
Addison’s disease
Glucocorticoid deficiency
Cardiac failure
Cirrhosis
Clinical features
Confusion
Lethargy
Personality changes
Complications
Convulsions
Coma
Death
Management
Treat the underlying cause