Oxford Handbook of Endocrinology and Diabetes by BMJ Best Practice has a dedicated topic for Endocrinology and Metabolic Disorders with subjects organised either by alphabetical order or emergency. An OpenAthens account is required to access this resource.
Endocrinology and Metabolic Disorders | BMJ Best Practice
NICE (National Institute for Health and Care Excellence)
BNF (British National Formulary)
Accessible online, in the BNF you can find information by drugs and you can find treatment summaries.
BNF (British National Formulary) | NICE