Common Registration Assessment, Part 1
Linagliptin 5mg tablets and once daily doses for the GPhC assessment
Three original practice questions, with the working shown. Read the stated prescription or plan before calculating.
Published 5 November 2026. Independent revision material, not GPhC questions, not for patient care.
The manufacturer's UK product information for linagliptin 5 mg film-coated tablets states that the dose of linagliptin is 5 mg once daily.
The same information states that no dose adjustment is required for patients with renal impairment, and that no dose adjustment is necessary based on age.
It also states that the tablets can be taken with or without a meal at any time of the day, and that if a dose is missed it should be taken as soon as the patient remembers, but a double dose should not be taken on the same day.
Each question fixes the values needed for its arithmetic. Write the unit beside every step and distinguish a single dose from a daily total or a supply period. All prescriptions and patients here are fictional; these are revision materials, not for patient care.
The method
- Identify the stated daily dose in milligrams and the tablet strength supplied.
- Multiply the daily dose by the stated number of days for a milligram total.
- Multiply the daily tablet count by the stated number of days for a supply quantity.
- Keep milligrams and tablets 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 patient takes linagliptin 5 mg once daily. How many milligrams is this over 30 days?
Show the answer
Answer: 150 mg
Working: 5 mg each day x 30 days = 150 mg in total.
Question 2
A fictional patient takes linagliptin 5 mg once daily using 5 mg tablets. How many tablets are needed for a 90-day supply?
Show the answer
Answer: 90 tablets
Working: One 5 mg tablet each day x 90 days = 90 tablets.
Question 3
A fictional patient is prescribed linagliptin 5 mg once daily and collects a 28-tablet pack. How many days does one pack last?
Show the answer
Answer: 28 days
Working: One 5 mg tablet each day. 28 tablets / 1 tablet each day = 28 days.
eMC SmPC: Linagliptin 5 mg film-coated tablets
https://www.medicines.org.uk/emc/product/4762/smpc
Where marks are lost
- Taking a double dose after a missed dose in the working.
- Counting a 28-tablet pack as 28 mg instead of 28 days.
- Forgetting that 5 mg once daily is one 5 mg tablet each day.
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 linagliptin dose?
No. Follow the stated prescription in the exercise. Real dosing checks include other diabetes medicines and the missed-dose instruction.
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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