Meglitinides: How Repaglinide and Nateglinide Control Mealtime Blood Sugar
Updated: 5 days ago
Written and medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026 · How we review
Quick Answer: What are meglitinides?
Meglitinides are fast-acting tablets for type 2 diabetes that prompt the pancreas to release more insulin. Repaglinide and nateglinide are taken up to 30 minutes before each meal to limit post-meal blood sugar spikes, and a dose is skipped when a meal is skipped. Main side effects are low blood sugar and weight gain. [1]
What the research says
Both meglitinides lower long-term blood sugar. A systematic review of 15 randomized trials with 3,781 participants found that, compared with placebo, repaglinide lowered HbA1c by 0.1% to 2.1% and nateglinide by 0.2% to 0.6%; repaglinide had a similar effect to metformin, and weight gain with meglitinides reached up to 3 kg in three months compared with metformin. (Black et al., Cochrane Database Syst Rev, 2007) [2]
The effect is modest but useful for mealtime spikes. A clinical review reported average HbA1c drops of 0.2% to 1.5% on a single meglitinide, with further reductions when combined with other oral diabetes medicines, and found no difference between nateglinide and placebo in core cardiovascular outcomes in the NAVIGATOR trial. (Philip and Fernandez, Curr Drug Saf, 2021) [3]
Advanced kidney disease raises the hypoglycemia risk. In a nationwide study of 2,793 meglitinide users with advanced chronic kidney disease and 2,793 matched non-users, meglitinide use nearly doubled the risk of low blood sugar (hazard ratio 1.94), and combining a meglitinide with insulin also raised that risk (hazard ratio 1.69). (Wu et al., Oncotarget, 2017) [4]
Key takeaways
Meglitinides treat type 2 diabetes only; they are not used for type 1 diabetes. [1]
Only two are approved: repaglinide and nateglinide. [1]
You take them up to 30 minutes before a meal, up to three times a day — one dose per meal. [1]
No meal, no dose. This flexibility suits people with irregular meal times. [1][3]
Watch for low blood sugar and weight gain. Repaglinide can also raise the risk of liver damage. [1][2]
Never take them together with sulfonylureas, which work in the same way. [1]
What are meglitinides?
Meglitinides are a class of oral diabetes medicines that treat type 2 diabetes by stimulating the pancreas to make more insulin. [1]
They come as tablets you swallow. They act quickly, and their effect wears off within a few hours. [1]
That short action is the key idea. A meglitinide gives your body a brief boost of insulin right when food arrives, rather than raising insulin all day long. [1]
Repaglinide and nateglinide are the only meglitinides approved by the U.S. Food and Drug Administration (FDA). [1]
How do meglitinides work?
Meglitinides work by acting directly on the beta cells of the pancreas, the cells that make insulin, so that more insulin is released into the bloodstream. [1]
Insulin is the main hormone that lowers blood sugar. It works like a key that lets glucose move from your blood into your cells, where it is used for energy. [1]
In type 2 diabetes, blood sugar often spikes after eating — especially after meals that contain carbohydrates. [1]
Taking a meglitinide shortly before you eat helps the pancreas release insulin early, so the spike is smaller. [1]
Step | What happens |
1. Before the meal | You swallow the tablet up to 30 minutes before eating. |
2. In the pancreas | Beta cells release more insulin into the blood. |
3. During the meal | Insulin helps glucose move from the blood into cells. |
4. A few hours later | The medicine's effect wears off. |
What are examples of meglitinides?
The two meglitinides in use are repaglinide (brand name Prandin®) and nateglinide (brand name Starlix®). [1]
Feature | Repaglinide | Nateglinide |
Brand name | Prandin® | Starlix® |
Tablet strengths | 0.5 mg, 1 mg, 2 mg | 60 mg, 120 mg |
When to take | Up to 30 minutes before a meal | Up to 30 minutes before a meal |
Doses per day | Up to 3 (one per meal) | Up to 3 (one per meal) |
Relative strength | Greater HbA1c reduction in head-to-head trials | Smaller HbA1c reduction |
Repaglinide is generally preferred because it lowers blood sugar more strongly. [3] In the two trials that compared the drugs directly (342 participants), people taking repaglinide had a bigger drop in HbA1c. [2]
Your dose is set by your healthcare provider. If you still have blood sugar spikes after meals, tell your provider — they can adjust the dose or choose another treatment. [1]
How do you take meglitinides?
Meglitinides are taken by mouth up to 30 minutes before a meal, once for each meal, for a maximum of three times a day. [1]
Take it before you eat. The medicine works fast, so timing it to the meal matters. [1]
Skip a meal, skip the dose. If you don't eat, you don't take the tablet. [1]
Share your full medicine list. Tell your provider about every medicine and supplement you use. Repaglinide must not be taken with gemfibrozil, a cholesterol medicine, because the combination can cause severe low blood sugar. [1]
This meal-by-meal pattern is one reason meglitinides are considered useful for people with variable meal timings, including older adults. [3]
What are the benefits of meglitinides?
The main benefits of meglitinides are fast action, flexible dosing around meals, and a lower chance of low blood sugar than some other diabetes medicines. [1]
Benefit | What it means for you |
Fast-acting | A tablet before a meal helps prevent the blood sugar spike that follows. [1] |
Flexible | No meal means no pill, which suits irregular schedules. [1] |
Lower hypoglycemia risk than some options | Because the effect wears off quickly, low blood sugar is less likely than with insulin or sulfonylureas. [1] |
Combines well | They can be taken with metformin and many other diabetes medicines. [1] |
Alternative to metformin | They may be an option when metformin causes side effects that can't be tolerated or can't be used. [2] |
What are the side effects and risks of meglitinides?
The main side effects of meglitinides are weight gain and low blood sugar (hypoglycemia). [1]
Low blood sugar. Meglitinides can raise the risk of hypoglycemia episodes. In trials, it happened more often than with metformin but was rarely severe enough to need help from another person. [1][2] Ask your provider which warning signs to watch for and how to treat a low — and read our guide to diabetic hypoglycemia.
Weight gain. Weight gain was generally greater than with metformin, up to 3 kg over three months. [2]
Liver damage (repaglinide). Repaglinide can also increase the risk of liver damage. [1]
Fewer stomach issues than metformin. Diarrhea occurred less often with meglitinides than with metformin. [2]
People with advanced chronic kidney disease face a higher risk of low blood sugar on meglitinides, and the risk rises further when a meglitinide is combined with insulin. [4]
Who shouldn't take meglitinides?
Meglitinides should not be taken by people who have type 1 diabetes or already take a medicine that works the same way (such as a sulfonylurea), and need extra caution in kidney or liver disease. [1]
Avoid meglitinides if you… | Why |
Have type 1 diabetes | They are approved only for type 2 diabetes. [1] |
Already take a sulfonylurea | Both drug types push the pancreas to release insulin. [1] |
Have kidney or liver disease | These conditions raise the risk of low blood sugar, so your provider may avoid them or start a lower dose with close monitoring. [1] |
Always give your provider your complete medical history before starting. [1]
Are meglitinides and sulfonylureas the same?
Meglitinides and sulfonylureas are not the same, although both stimulate the pancreas to make insulin. [1]
Meglitinides | ||
How they work | Stimulate insulin release | Stimulate insulin release |
Speed | Act quickly | Release insulin more slowly |
Low blood sugar risk | Lower, because the effect wears off fast | Higher by comparison |
Take together? | No — never combine the two | No — never combine the two |
Source: [1]
Conclusion
Meglitinides are a focused tool for type 2 diabetes: a short-acting tablet that matches insulin release to your meals. Repaglinide and nateglinide can lower HbA1c, work well alongside metformin, and give you the freedom to skip a dose when you skip a meal. [1][2]
The trade-offs are real — low blood sugar, weight gain, and, for repaglinide, a possible risk to the liver. People with kidney or liver disease, type 1 diabetes, or a current sulfonylurea prescription should not use them. [1]
Take the next step: If post-meal spikes are part of your diabetes picture, bring this guide to your next appointment and ask whether a meglitinide fits your treatment plan. To see how this class compares with every other option, read our complete guide to diabetes medications, and learn practical habits in blood sugar monitoring: how, when, and why to check.
FAQ
What are meglitinides used for?
Meglitinides are used to treat type 2 diabetes by lowering the blood sugar spikes that happen after meals. They are not used for type 1 diabetes.
How quickly do meglitinides work?
Meglitinides work quickly, which is why they are taken up to 30 minutes before a meal. Their effect wears off within a few hours.
What happens if I skip a meal while taking a meglitinide?
If you skip a meal, you skip that meglitinide dose. The medicine is taken only with meals, up to three times a day.
Can meglitinides cause low blood sugar?
Meglitinides can cause low blood sugar (hypoglycemia), though the risk is lower than with insulin or sulfonylureas because the effect fades quickly. The risk is higher in people with advanced kidney disease.
Can I take meglitinides with metformin?
Meglitinides can be taken with metformin and many other diabetes medicines. Your healthcare provider decides which combination is right for you.
Are meglitinides the same as sulfonylureas?
Meglitinides are not the same as sulfonylureas: both stimulate insulin release, but meglitinides act faster and wear off sooner. The two should never be taken together.
Who should not take meglitinides?
People with type 1 diabetes or who already take a sulfonylurea should not take meglitinides, and people with kidney or liver disease need extra caution. Share your full medical history with your provider first.
Do meglitinides cause weight gain?
Meglitinides can cause weight gain. In trials, weight gain was generally greater than with metformin, reaching up to 3 kg over three months.
Can I drink alcohol while taking a meglitinide?
Alcohol can raise your risk of low blood sugar while you take a meglitinide, especially on an empty stomach. Ask your provider whether alcohol is safe for you, and never drink without eating.
What should I do if my blood sugar goes low on a meglitinide?
Eat or drink about 15 grams of fast-acting sugar, such as juice or glucose tablets, and recheck your blood sugar in 15 minutes. Call 911 if someone is confused, has a seizure or cannot swallow safely.
Related reading
References
Cleveland Clinic. Meglitinides: What They Are, How They Work & Side Effects. Cleveland Clinic. Last updated March 11, 2026. https://my.clevelandclinic.org/health/treatments/meglitinides
Black C, Donnelly P, McIntyre L, et al. Meglitinide analogues for type 2 diabetes mellitus. Cochrane Database Syst Rev. 2007;2007(2):CD004654. PMID 17443551. https://doi.org/10.1002/14651858.CD004654.pub2
Philip J, Fernandez CJ. Efficacy and Cardiovascular Safety of Meglitinides. Curr Drug Saf. 2021;16(2):207-216. PMID 33106149. https://doi.org/10.2174/1574886315666201026125848
Wu PC, Wu VC, Lin CJ, et al. Meglitinides increase the risk of hypoglycemia in diabetic patients with advanced chronic kidney disease: a nationwide, population-based study. Oncotarget. 2017;8(44):78086-78095. PMID 29100450. https://doi.org/10.18632/oncotarget.17475
Medical disclaimer
This article is for general educational purposes only and does not replace professional medical advice, diagnosis, or treatment. Do not start, stop, or change any diabetes medicine without talking to your healthcare provider. If you think you are having a medical emergency, call your local emergency number right away.
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