Dosage for liquid medicines
Find out more about how to calculate the right amount of liquid medicine to give a patient. Use practice examples to help you with your approach and explore the two main ways of calculating dosage, using mental arithmetic or a formula.
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Resource
Available to RCN members
Who is this resource for?
This resource is aimed at nurses and nursing support workers across all settings and levels of practice, including students of health, social work and care professions.What will this resource give me?
- how prescriptions are written in terms of weight and concentration
- introduction to using the ‘PEACE’ problem-solving method
- the differences with using a mental arithmetic and formula approach
- what methods to use to evaluate your calculation
- practice examples to test your knowledge
- understanding strengths and concentrations.
Resource last reviewed
30 Mar 2025
Resource lead
Who is this resource for?
This resource is aimed at nurses and nursing support workers across all settings and levels of practice, including students of health, social work and care professions.
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;Downloaded content date
PDF created on: 15 Sept 2025.
Downloaded from: https://uatlearncyan.rcn.org.uk/Search/Dosage-for-liquid-medicines.
Please check: https://rcnlearn.rcn.org.uk for a more up-to-date version of this content.