Endocrine / Diabetes
DPP-4 inhibitors
"-gliptin" drugs — Well-tolerated oral diabetes drugs that rarely cause hypos — names ending in "-gliptin".
Education and reference only. This is a plain-language class overview — it deliberately contains no doses. Always check the current Summary of Product Characteristics (SmPC), the BNF and your local formulary before prescribing or administering any medicine.
What it is
DPP-4 inhibitors are oral medicines for type 2 diabetes, valued for being well tolerated and unlikely to cause low blood glucose on their own.
How it works
They block the enzyme DPP-4, which normally breaks down the body's own incretin hormones. Higher incretin levels boost insulin and reduce glucagon when glucose is raised, lowering glucose in a glucose-dependent way.
In practice
In practice gliptins are a useful, weight-neutral add-on that rarely cause hypoglycaemia, which makes them attractive in older or frailer patients. Their glucose-lowering is modest, most need a dose reduction as kidney function falls (linagliptin being an exception), and a rare association with pancreatitis means stopping if severe abdominal pain develops. They are a reasonable choice when SGLT2 inhibitors or GLP-1 agonists are unsuitable.
Examples
Practical use
How to take it & use it well
- These tablets are usually taken once daily and can be taken with or without food; pick a time that helps you remember.
- Try to take your dose at roughly the same time each day to keep blood glucose control steady.
- Keep taking them even when you feel well, as type 2 diabetes often causes no symptoms but still needs treatment.
- Continue your other diabetes medicines, diet and activity advice unless your GP or diabetes team tells you otherwise.
- If you miss a dose, take it when you remember on the same day, but skip it if your next dose is almost due rather than doubling up.
Common uses
- Type 2 diabetes (often as add-on therapy)
Monitoring
- HbA1c
- Renal function (for dose adjustment)
Weighing it up
Advantages & disadvantages
Advantages
- They lower blood glucose with a low risk of causing very low blood sugar when used on their own.
- They are weight neutral, so they tend not to cause the weight gain seen with some other diabetes treatments.
- Taken as a once-daily tablet, they are simple to fit into a daily routine.
- Some options, such as linagliptin, can often be used without dose changes in people with reduced kidney function.
Disadvantages
- They usually lower glucose only modestly, so they may not be enough on their own for everyone.
- Some people get cold-like symptoms, headache or a mild upset stomach.
- There is a rare risk of pancreatitis, so persistent severe tummy pain should be checked urgently.
- Painful joints have occasionally been reported and may settle after stopping the medicine.
Key safety principles
What to watch for
- Generally well tolerated; rare pancreatitis — stop if severe, persistent abdominal pain occurs.
- Most need dose reduction in renal impairment (linagliptin is an exception).
- Modest glucose-lowering compared with some alternatives.
Key interactions
What to avoid or check alongside
- Combining with insulin or a sulfonylurea raises the chance of low blood sugar, so your team may adjust those medicines.
- Certain enzyme-inducing drugs, such as rifampicin or some epilepsy medicines, can reduce the effect of linagliptin.
- Other glucose-lowering medicines add to the overall blood-sugar-lowering effect and need monitoring together.
- Some research has linked DPP-4 inhibitors taken with certain blood pressure tablets called ACE inhibitors to a small increase in angioedema risk.
Patient & carer advice
- Report severe, persistent tummy pain
- These are usually well tolerated and unlikely to cause hypos on their own
- Take alongside diet and activity changes
Use with
Related clinical calculators
Dose and risk decisions for this class often depend on renal function, weight or bleeding/stroke risk. These tools help:
Answers
DPP-4 inhibitors: frequently asked questions
What are DPP-4 inhibitors used for?
They are tablets used to help control blood glucose in type 2 diabetes, usually alongside diet, activity and sometimes other diabetes medicines.
Do gliptins cause low blood sugar?
On their own they rarely cause low blood sugar. The risk goes up if they are combined with insulin or a sulfonylurea, which may then need adjusting.
Will I gain weight on a gliptin?
These medicines are generally weight neutral, meaning they tend not to cause the weight gain associated with some other diabetes treatments.
Can I take a gliptin with kidney problems?
Some, such as linagliptin, can often be used without dose changes in reduced kidney function. Your prescriber chooses the right option and may check your kidney blood tests.
What should I do if I miss a dose?
Take it when you remember on the same day. If your next dose is almost due, skip the missed one and carry on as normal; do not take two doses together.
Authoritative sources
Always verify against the source
This overview is for orientation. For doses, interactions, contra-indications and the full monograph, use:
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