Oral Liquid Doses
Convert a prescribed dose into millilitres from the labelled concentration.
How to prepare for the NMC Midwifery CBT
Combine unit-safe calculation with newly qualified midwife judgement grounded in the Code, informed choice, continuity, physiology, timely escalation and collaborative care.
Core concepts
Concept 1
The labelled mass and its stated volume must remain paired.
Exam cue: Read concentration as stock dose per stock volume.
Concept 2
The final volume must be measurable using an appropriate device.
Exam cue: A stronger preparation should need less volume.
Risk pitfalls and guardrails
Discarding the labelled stock volume.
Guardrail: Do not choose a familiar task if it ignores deterioration, consent, medicines risk, scope, communication or follow-up.
Reporting mass instead of millilitres.
Guardrail: Do not choose a familiar task if it ignores deterioration, consent, medicines risk, scope, communication or follow-up.
Memory anchors
What is the liquid-dose formula?
Required dose ÷ stock dose × stock volume.
How is 125 mg in 5 mL read?
125 mg is paired with 5 mL.
For the same dose, what does greater concentration do?
It reduces the required volume.
What is the usual final liquid unit?
Millilitres.
What practical check is needed?
The calculated volume can be measured accurately.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
An oral liquid contains 250 mg in 5 mL. The prescribed dose is 500 mg. What volume is required?
A suspension contains 125 mg in 5 mL. A dose of 750 mg is prescribed. What volume is needed?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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