Oral Liquid Doses
Convert prescribed oral-liquid doses into millilitres from a labelled concentration or ratio.
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Core concepts
Concept 1
A label such as a mass in a stated volume must remain paired when calculating the administration volume.
Exam cue: Read the concentration as stock dose per stock volume.
Concept 2
The final volume must be measurable with the available oral device and appropriate to the patient.
Exam cue: Sanity-check whether a stronger preparation should require a smaller volume.
Risk pitfalls and guardrails
Treating the labelled volume as if it contained one milligram.
Guardrail: Do not select a familiar task if it ignores deterioration, consent, medicines risk, scope, communication or follow-up.
Reporting the required mass instead of the millilitres to administer.
Guardrail: Do not select a familiar task if it ignores deterioration, consent, medicines risk, scope, communication or follow-up.
Memory anchors
What is the oral-liquid formula?
Required dose divided by stock dose, multiplied by stock volume.
How should a label such as 125 mg in 5 mL be read?
The paired stock dose is 125 mg and the paired stock quantity is 5 mL.
What happens to volume when concentration rises for the same dose?
The required volume falls.
What is the final unit for an oral-liquid administration?
Usually millilitres, unless the question states otherwise.
What practical check follows calculation?
The volume can be measured accurately with the correct oral device.
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 125 mg in 5 mL. What volume provides a 250 mg dose?
A medicine contains 20 mg in 5 mL. A 60 mg dose is prescribed. What volume is required?
Answer all questions to submit.
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Continue learning
Move forward only after this module is stable.
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