Common Registration Assessment, Part 1

Pramipexole microgram tablets and weekly titration steps for the GPhC assessment

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

Published 3 November 2026. Independent revision material, not GPhC questions, not for patient care.

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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 MIRAPEXIN tablets gives an ascending dose schedule for adults with Parkinson's disease: week 1 is 3 x 0.088 mg of base a day (0.264 mg a day) and week 2 is 3 x 0.18 mg of base a day (0.54 mg a day). For week 3 it lists 3 x 0.35 mg of base and a rounded daily figure of 1.1 mg. Multiplying the displayed tablet strength gives 1.05 mg; do not use the rounded table figure as an exact arithmetic equality.

The same information states that if a further increase is needed, the daily dose should be increased by 0.54 mg of base at weekly intervals up to a maximum of 3.3 mg of base a day.

Doses are taken three times a day in equally divided doses, and the product information uses both base and salt figures; these exercises use the base figures. Kidney function can require lower doses and a different frequency; the three-times-daily schedule is not universal.

Each question fixes the values needed for its arithmetic. Write the unit beside every step and keep micrograms and milligrams straight. All prescriptions and patients here are fictional; these are revision materials, not for patient care.

The method

  1. Convert the stated tablet strength to micrograms when the question works in micrograms.
  2. Multiply the per-dose amount by 3 for the three times a day schedule.
  3. Multiply the daily amount by 7 for a weekly total.
  4. Count one tablet per stated dose, then multiply by doses per day and days.

Three practice questions

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

Question 1

A fictional patient takes pramipexole 0.088 mg three times a day in week 1. How many micrograms is the daily total?

Show the answer

Answer: 264 micrograms

Working: 0.088 mg = 88 micrograms; 88 micrograms x 3 doses = 264 micrograms a day.

Question 2

A fictional patient takes pramipexole 0.18 mg three times a day throughout week 2. How many milligrams is the weekly total?

Show the answer

Answer: 3.78 mg

Working: 0.18 mg x 3 doses = 0.54 mg a day; 0.54 mg x 7 days = 3.78 mg.

Question 3

A fictional prescription for week 1 reads pramipexole 0.088 mg three times a day using 0.088 mg tablets. How many tablets does the week need?

Show the answer

Answer: 21 tablets

Working: 1 tablet per dose x 3 doses = 3 tablets a day; 3 tablets x 7 days = 21 tablets.

eMC SmPC: MIRAPEXIN 0.088 mg tablets

https://www.medicines.org.uk/emc/product/1553/smpc

Where marks are lost

  • Treating the daily total as the per-dose amount on a three times a day schedule.
  • Dropping a factor of 1,000 when converting between milligrams and micrograms.
  • Treating arithmetic as evidence that a real prescription is clinically suitable.

Frequently asked questions

Are these official assessment questions?

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

Can a dose-total calculation justify changing a real dose?

No. Follow the steps in the exercise. Real titration is gradual and needs clinical checks.

How should I check the answer?

Check the requested unit, then work backwards from the quantity to the stated dose and duration.

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

Try 15 free questions with worked answers. No sign-up required.

More calculation topics

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