Common Registration Assessment, Part 1
Indapamide tablet strengths and morning doses for the GPhC assessment
Three original practice questions, with the working shown. Read the stated prescription or plan before calculating.
Published 20 October 2026. Independent revision material, not GPhC questions, not for patient care.
The BNF lists standard indapamide tablets as 2.5 mg and modified-release tablets as 1.5 mg.
The BNF gives the usual adult dose as 2.5 mg once a day, taken in the morning, or 1.5 mg once a day for the modified-release form.
Each question fixes the values needed for its arithmetic. Write the unit beside every step and keep a single dose separate from a supply total. All prescriptions and patients here are fictional; these are revision materials, not for patient care.
The method
- Identify the exact form, strength and frequency supplied in the question.
- Standard and modified-release tablets are not interchangeable strengths; keep them separate.
- Keep the once-daily frequency in view: one dose each morning.
- Scale to the stated duration only when a supply is requested.
- Check the tablet count is a whole number before reporting it.
Three practice questions
Work each one on paper first, then open the answer. All patients and prescriptions are fictional.
Question 1
A fictional prescription specifies indapamide 2.5 mg each morning using 2.5 mg standard tablets. How many tablets are needed for 28 days?
Show the answer
Answer: 28 tablets
Working: 2.5 ÷ 2.5 = 1 tablet a day. 1 × 28 = 28 tablets.
Question 2
A fictional prescription specifies indapamide 1.5 mg modified-release tablets each morning. How many tablets are needed for 90 days?
Show the answer
Answer: 90 tablets
Working: 1.5 ÷ 1.5 = 1 tablet a day. 1 × 90 = 90 tablets.
Question 3
A fictional plan changes indapamide from 2.5 mg standard tablets to 1.5 mg modified-release tablets, both taken once each morning. How many modified-release tablets cover 8 weeks under the new plan?
Show the answer
Answer: 56 tablets
Working: The new plan is 1 tablet a day. 8 weeks is 8 × 7 = 56 days, so 1 × 56 = 56 tablets.
Exam approach
Formulation words carry marks. Underline standard or modified-release before touching the calculator, because the strength changes with the form.
Where marks are lost
- Treating 2.5 mg standard and 1.5 mg modified-release as interchangeable.
- Reporting a daily total when the question asks for a supply, or the other way round.
- Forgetting to convert weeks to days before multiplying.
Frequently asked questions
Are these official assessment questions?
No. They are original revision exercises, not official GPhC questions and not for patient care.
Do I need to memorise the strengths?
The exercise supplies them. In the assessment, read any given product information exactly as written.
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.
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