Diabetes medicines
Type 2 diabetes tablets and injections in the UK — metformin, SGLT2 inhibitors, GLP-1 medicines, and more — with safety-focused hub content.
What are diabetes medicines?
Diabetes medicines are tablets or injections used in the UK to help control blood glucose in type 2 diabetes (and other situations as prescribed), usually together with diet, activity, and weight management. They work in different ways — for example by reducing liver glucose output, increasing insulin release, helping the kidneys remove glucose, or mimicking natural gut hormones. Your diabetes team or GP agrees targets, monitoring, and sick-day rules for your combination of medicines.
General UK information only — your GP, pharmacist, or specialist can personalise advice and check interactions with your prescriptions.
Quick answers
Short points people often scan before reading the full hub or speaking to a clinician.
What are they used for?
They lower blood glucose and, for some drug classes, protect the heart and kidneys when appropriate. They do not replace healthy eating and exercise.
Common types
Metformin, sulfonylureas (e.g. Gliclazide), SGLT2 inhibitors (e.g. Dapagliflozin), DPP-4 inhibitors, GLP-1 receptor agonists such as Ozempic (Ozempic), and sometimes insulin in addition to tablets.
Do you need them long term?
Many people with type 2 diabetes use medicines for years because the condition is chronic. Doses and combinations change over time with HbA1c results and your overall health.
Common side effects
Examples: stomach upset with Metformin; hypos with Gliclazide or insulin; thrush or urine infections with SGLT2 inhibitors; nausea with GLP-1 injections. Your team explains what to watch for.
What are the most common diabetes medications in the UK?
Metformin is the usual first tablet for many adults with type 2 diabetes. Gliclazide and other sulfonylureas, Dapagliflozin and other SGLT2 inhibitors, and GLP-1 injections are added when glucose, heart, or kidney goals need extra support.
Insulin is used when tablets are not enough or during illness and pregnancy under specialist plans.
Follow the individual drug guides on this page and your diabetes nurse’s advice for monitoring and lifestyle.
What is the safest diabetes medication?
Safety depends on kidney function, risk of low blood sugar, heart and kidney disease, weight, and other tablets. Metformin suits many people but is avoided or reduced in some kidney problems; sulfonylureas and insulin carry higher hypo risk than metformin alone.
SGLT2 inhibitors need discussion about infections, dehydration, and sick-day rules. GLP-1 medicines are not suitable for everyone.
Your GP or diabetes team selects the combination with the best benefit–risk profile for you.
Can diabetes tablets be stopped if my sugars improve?
Sometimes weight loss or remission strategies allow dose reduction or stopping under medical supervision — never stop without your team’s plan, especially if you use insulin, sulfonylureas, or SGLT2 inhibitors.
Blood tests and home glucose checks guide decisions. Stopping suddenly can cause dangerous highs or, in some situations, other complications.
If you are unwell, vomiting, or cannot eat, seek advice — sick-day rules may include pausing certain tablets temporarily.
Medicines in this category
Open a guide for uses, side effects, interactions, and safety topics. Your prescriber chooses what is appropriate for you.
- Dapagliflozin(dapagliflozin)
Dapagliflozin (Forxiga) UK: type 2 diabetes & heart/kidney uses, side effects, UTIs, ketoacidosis warning. General guide — follow your prescriber.
- Empagliflozin(empagliflozin)
Empagliflozin UK: SGLT2 inhibitor for type 2 diabetes, UTI and genital infection cautions, sick-day rules — general information.
- Gliclazide(gliclazide)
Gliclazide UK: type 2 diabetes tablet, hypos, dosage with food, side effects vs metformin. Your diabetes team may advise monitoring and targets.
- Insulin aspart(insulin aspart)
Insulin aspart UK: rapid-acting mealtime insulin, hypos, driving, and sick-day rules — general information.
- Insulin glargine(insulin glargine)
Insulin glargine UK: long-acting basal insulin, hypoglycaemia, injection rotation, sick days — general patient information.
- Linagliptin(linagliptin)
Linagliptin UK: DPP-4 inhibitor that needs less kidney dose change, type 2 diabetes uses — general information.
- Liraglutide(liraglutide)
Liraglutide UK: GLP-1 injection for diabetes (Victoza) and weight paths (Saxenda) under separate licences — general information.
- Metformin(metformin)
Metformin for type 2 diabetes: how it works, common side effects, and safety. General UK information — your diabetes team can personalise advice.
- Ozempic(semaglutide)
Ozempic (semaglutide) UK: type 2 diabetes injection, how it works, nausea & side effects, who it’s for — not weight-loss self-treatment. Prescriber-only medicine.
- Pioglitazone(pioglitazone)
Pioglitazone UK: glitazone for type 2 diabetes, fluid retention, fracture risk, bladder safety — general information.
- Repaglinide(repaglinide)
Repaglinide UK: prandial glucose-lowering tablet before meals, hypo risk, liver checks — general information.
- Sitagliptin(sitagliptin)
Sitagliptin UK: DPP-4 inhibitor for type 2 diabetes, pancreatitis awareness, low hypo risk alone — general information.
More popular questions
Extra topics people ask about in search and in pharmacy consultations — check with your GP or pharmacist for advice tailored to you.
- What is usually the first medicine for type 2 diabetes?
- Metformin is commonly first-line for many adults alongside lifestyle advice, unless it is not suitable for you. Your prescriber chooses based on kidney function, other illnesses, and national guidance.
- What are the signs of low blood sugar on gliclazide or insulin?
- Shakiness, sweating, hunger, confusion, or palpitations can be hypos. Treat with quick-acting carbohydrate as your team taught you and seek help if severe — sulfonylureas and insulin carry higher hypo risk than Metformin alone.
- Why might I be prescribed dapagliflozin or another SGLT2 tablet?
- SGLT2 inhibitors lower glucose and can benefit heart and kidneys in suitable patients. They increase urine glucose — thrush and urine infections are common topics to discuss with your GP.
- Is Ozempic the same as insulin?
- No — Ozempic (Ozempic) is a GLP-1 injection for type 2 diabetes in licensed situations. It works differently from insulin; some people use both under supervision.
- When should I contact my diabetes team urgently?
- If you cannot keep fluids down, are vomiting with abdominal pain, have confusion, or breath that smells fruity — possible diabetic ketoacidosis — especially if unwell on an SGLT2 inhibitor. Use NHS 111 or 999 as appropriate.