www.bnf.org.uk
This website offers comprehensive information about medicines licensed for use within the UK. It provides information about the pharmacology, dose of the medication, its brand and its generic name. They are very useful resources for nurses in practice and your clinical practice areas will also have access to copies of these. British National Formulary Child is for those caring for children and young people, while British National Formulary is for those caring for adult patients, including those with a mental health need.

www.nice.org.uk/Search.do?searchText=medicines&newsearch=true&x=14&y=23
NICE provides a range of guidance and evidence relating to the optimisation of medicines treatment for patients. A simple search using medicines as a keyword will produce a useful starting point for further exploration.

www.nmc-uk.org/Documents/NMC-Publications/NMC-Standards-for-medicines-management.pdf
This NMC document offers the professional standards for the administration and management of medicines which must be adhered to by every qualified nurse.

www.nursingnumeracy.info/page11/page5/page5.html
This website includes an example of a short, free interactive test, which allows you to calculate medicines and prepare them for the patient, including measurement. The visual cues show you how the same calculation can look different in practice, as compared to undertaking a calculation using formulae on paper.