Common Registration Assessment, Part 1

Midazolam oromucosal pre-filled syringe doses by age band for the GPhC assessment

Three original practice questions, with the working shown. Read the stated prescription or plan before calculating.

Published 8 November 2026. Independent revision material, not GPhC questions, not for patient care.

A paramedic administering first aid beside an ambulance
Photo from Pexels, used under the Pexels licence. It is a stock image and does not show the exercise.

The manufacturer's UK product information for Buccolam (midazolam) oromucosal solution states that the standard dose for a child from 1 year to under 5 years is 5 mg, from 5 years to under 10 years is 7.5 mg, and for patients aged 10 years and above is 10 mg. For infants over 6 months to under 1 year the dose is 2.5 mg, and for infants 3 to 6 months the 2.5 mg dose applies in a hospital setting only.

The same information states that each pre-filled oral syringe contains a single fixed dose, for example 2.5 mg in 0.5 ml of solution, a concentration of 5 mg per ml, and that carers should only administer a single dose.

It also states that if the seizure has not stopped within 10 minutes after administration, emergency medical assistance must be sought, and that a second or repeat dose when seizures re-occur after an initial response should not be given without prior medical advice.

Each question fixes the values needed for its arithmetic. Write the unit beside every step and distinguish a single dose from a volume or a supply period. All prescriptions and patients here are fictional; these are revision materials, not for patient care.

The method

  1. Match the stated age to its dose band: under 1 year 2.5 mg, 1 to under 5 years 5 mg, 5 to under 10 years 7.5 mg, 10 years and above 10 mg.
  2. Divide the dose in mg by 5 mg per ml for the volume in ml.
  3. Check the stated age band edges carefully, such as under 5 years versus 5 years.
  4. Keep mg, ml and single-dose rules separate; convert only when the question asks.

Three practice questions

Work each one on paper first, then open the answer. All patients and prescriptions are fictional.

Question 1

A fictional 4 year old child is prescribed Buccolam. What is the standard dose, and what volume does the pre-filled syringe contain at 5 mg per ml?

Show the answer

Answer: 5 mg; 1 ml

Working: Age 1 year to under 5 years: 5 mg. Volume: 5 mg / 5 mg per ml = 1 ml.

Question 2

A fictional 7 year old child is prescribed Buccolam. What is the standard dose, and what volume does the pre-filled syringe contain at 5 mg per ml?

Show the answer

Answer: 7.5 mg; 1.5 ml

Working: Age 5 years to under 10 years: 7.5 mg. Volume: 7.5 mg / 5 mg per ml = 1.5 ml.

Question 3

A fictional 12 year old is prescribed Buccolam. What is the standard dose, what volume is in the syringe at 5 mg per ml, and how many doses may a carer administer?

Show the answer

Answer: 10 mg; 2 ml; one dose

Working: Age 10 years and above: 10 mg. Volume: 10 mg / 5 mg per ml = 2 ml. Carers should only administer a single dose.

eMC SmPC: BUCCOLAM 2.5 mg oromucosal solution

https://www.medicines.org.uk/emc/product/2768/smpc

Where marks are lost

  • Placing a 4 year old in the 5 years to under 10 years band; 4 years sits in the 1 year to under 5 years band.
  • Dividing by the dose instead of the 5 mg per ml concentration when working out the volume.
  • Allowing a second carer-administered dose when the label limits carers to a single dose.

Frequently asked questions

Are these official assessment questions?

No. They are original revision exercises, not official GPhC questions and not for patient care.

Does this calculation decide a real midazolam dose?

No. Follow the stated age in the exercise. Real dosing follows the label age bands, and carers give a single dose only.

How should I check the answer?

Check the age band edges carefully, then divide the stated dose by 5 mg per ml for the volume.

Sources

The questions above are original and use fictional patients and prescriptions. PreRegExamPrep is not affiliated with or endorsed by the General Pharmaceutical Council.

Practise until the method is automatic

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More calculation topics

See also the formula sheet, the eight sample questions and the approved calculator page.