BMJ Best Practice has dedicated topics for Nephrology and Urology with subjects organised either by alphabetical order or emergency. An OpenAthens account is required to access this resource.
Nephrology | 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