Type 2 Diabetes Medications for Older Adults: Which Are Safest?

Have you or an older parent been told that your A1C is too high or that its time to add another diabetes medication?If so, you may assume that the goal should be to get blood sugar as low as possible.But when it comes to treating Type 2 diabetes in older adults, especially people in their 70s, 80s, and beyond, lower is not always better.Thats because diabetes treatment has both benefits and risks.And some of the most important risks especially hypoglycemia, or dangerously low blood sugar become more concerning as people get older.So in older adults, diabetes treatment often needs to be individualized.The right blood sugar target and medication plan can depend on whether someone is relatively healthy and active, or is living with frailty, memory problems, heart or kidney disease, or other health issues.To explain how geriatricians approach this, I spoke with my UCSF geriatrics colleague Sei Lee, MD MAS, a Professor of Geriatrics who has studied diabetes in older adults for many years.In this article, Ill explain how diabetes treatment often needs to change with age, why a lower A1C isnt always better, and which diabetes medications may be safer for older adults.Why Tight Control of Diabetes Isnt Always Better in AgingYou may have heard healthcare professionals talk about getting diabetes under tight control.This generally means maintaining relatively low blood glucose levels and a low hemoglobin A1C.For many years, aiming for an A1C below 7% was commonly recommended.But when treating older adults, we have to think about two important issues.The benefits of tighter blood sugar control take timeOne reason to control blood sugar is to reduce the long-term complications of diabetes.These can include:Heart attackStrokeKidney diseaseEye diseaseNerve damageThe important thing to understand is that the benefits of very tight blood sugar control generally take many years to develop.As Dr.

Lee explained in our conversation, available research suggests that it may take at least eight years, and possibly much longer, for tighter control to provide certain long-term benefits.That matters when treating an older adult who is already frail or has significant health problems.If a treatment is unlikely to provide meaningful benefit for many years but can cause problems today, then the balance of benefits and risks changes.Tight control can increase the risk of hypoglycemiaThe most important short-term danger of aggressive diabetes treatment is hypoglycemia, meaning blood sugar that becomes too low.Certain diabetes medications can lower blood sugar too much, especially insulin and a class of medications called sulfonylureas.For example, an insulin dose may work well when an older person is eating normally.But if they become ill and eat much less than usual, that same dose can push the blood sugar dangerously low.Hypoglycemia can cause:WeaknessDizzinessShakinessConfusionFallsLoss of consciousnessSeizuresAnd older adults appear to be particularly vulnerable to serious episodes of hypoglycemia.So in geriatrics, avoiding dangerously low blood sugar can be just as important as lowering high blood sugar.What Should the A1C Goal Be for an Older Adult?There is no single ideal A1C for everyone over age 65.Instead, the goal should reflect the older persons overall health and the risks involved in getting to a lower number.Current 2026 American Diabetes Association guidance generally recommends:Healthy older adults with intact cognition and function: an A1C goal around 7.07.5% may be reasonable.Older adults with more complicated health, frailty, functional limitations, or cognitive impairment: a less stringent goal such as under 8% is often more appropriate.People with very complex or poor health: the priority shifts away from achieving a particular A1C and toward avoiding hypoglycemia and symptomatic high blood sugar.These are starting points, not rules.A lower A1C may be perfectly reasonable if it can be achieved safely and easily.For instance, an older person who has an A1C of 6.8% while taking only metformin and experiencing no problems is very different from someone who needs several medications and frequent insulin injections to maintain the same A1C.So when considering an A1C goal, I recommend asking:How hard will it be to reach this goal?Which medications will be required?How likely are those medications to cause hypoglycemia or other side effects?How much additional benefit are we likely to gain by lowering the A1C further?Diabetes Medications for Older AdultsThere is no single best diabetes medication for every older adult.The best choice depends on the persons overall health, kidney and heart function, risk of low blood sugar, weight, frailty, cost concerns, and other factors.Still, some types of diabetes medication are generally more concerning than others when it comes to hypoglycemia.MetforminFor many people with Type 2 diabetes, metformin remains a good first medication.Metformin helps the body respond better to insulin.Its main advantages include:Very low risk of hypoglycemia when used aloneLow costDecades of clinical experienceTaken by mouthEffective glucose lowering for many peopleFor these reasons, Dr.Lee and I both often favor metformin as a starting medication when it is appropriate for the individual.Of course, metformin isnt suitable for everyone.

Kidney function and gastrointestinal side effects need to be considered.But in an older person who tolerates it well, metformin often offers a favorable balance of benefits and risks.SGLT2 Inhibitors: Jardiance, Farxiga, Invokana and OthersSGLT2 inhibitors are a newer group of diabetes medications.Examples include:Empagliflozin (Jardiance)Dapagliflozin (Farxiga)Canagliflozin (Invokana)These medications work through the kidneys.They reduce the amount of glucose that the kidneys reabsorb, causing more glucose to leave the body through the urine.One important advantage is that SGLT2 inhibitors have a very low risk of causing hypoglycemia when used by themselves.They can also provide important benefits for certain people with heart failure or kidney disease.But there are some special concerns in older adults.Because these medications cause more glucose to be excreted in the urine, they may increase the risk of genital or urinary infections.They can also increase urination.For a relatively healthy older person with diabetes and certain heart or kidney problems, an SGLT2 inhibitor may be particularly useful.But I would be more cautious in someone who is frail and already has significant urinary incontinence or other problems that could be worsened by increased urination.GLP-1 Medications: Ozempic, Trulicity, Victoza and OthersFew diabetes drugs have received as much attention recently as the GLP-1 receptor agonists.These include:Semaglutide (Ozempic or Wegovy)Dulaglutide (Trulicity)Liraglutide (Victoza or Saxenda)There is also tirzepatide (Mounjaro or Zepbound), which works on both GLP-1 and GIP pathways.These medications can:Lower blood sugarReduce appetiteProduce substantial weight lossReduce cardiovascular risk in certain peopleCause relatively little hypoglycemia when used aloneThese benefits can make them attractive for an older adult with Type 2 diabetes who is overweight and otherwise relatively healthy.But there is an important issue to consider in later life.Why weight loss can be a concern in older adultsWeight loss is not always beneficial for older people.This is especially true for people who are already frail, thin, or losing weight unintentionally.And when people lose weight while taking GLP-1 medications, they dont necessarily lose only body fat.They can also lose muscle mass.Muscle is extremely important for maintaining health and independence in later life.Loss of muscle can contribute to:WeaknessDifficulty walkingFallsLoss of independenceIncreasing frailtyThere is also concern that some bone mass may be lost along with weight.So I would be particularly cautious about using medications that cause substantial weight loss in a frail older adult.The situation can be quite different for someone in their late 60s or 70s who is significantly overweight, relatively strong and active, and has heart or metabolic risks that could improve with weight loss.For people in between these two extremes, the decision often requires careful clinical judgment.If an older person does use a GLP-1 medication, maintaining appropriate nutrition and physical activity especially exercises intended to preserve strength and muscle becomes particularly important.Other downsides of GLP-1 medications can include:Nausea and other gastrointestinal symptomsReduced appetiteExpenseThe need for injections with many formulationsSo these medications can be very useful, but they arent necessarily the right choice for every older adult.Sulfonylureas: Glipizide and Similar MedicationsSulfonylureas are an older class of oral diabetes medications.One commonly used example is glipizide.Sulfonylureas work by stimulating the pancreas to release more insulin.Advantages include:Relatively inexpensiveTaken by mouthLong track recordEffective at lowering blood glucoseBut there is an important disadvantage for older adults:Sulfonylureas can cause hypoglycemia.They may also contribute to weight gain.These medications were used much more commonly in the past.Today, newer diabetes medications are increasingly preferred in many situations because some provide heart or kidney benefits without the same degree of hypoglycemia risk.If an older person is taking a sulfonylurea and is having falls, dizziness, confusion, or documented low blood sugar, I would certainly recommend reviewing the medication with their health provider.PioglitazonePioglitazone is another older oral diabetes medication.It belongs to a class called thiazolidinediones and works primarily by improving the bodys sensitivity to insulin.Its advantages include:Low costRelatively low risk of hypoglycemiaHowever, pioglitazone can cause fluid retention and can be problematic for people with certain heart conditions.For this reason, it has a more limited role in diabetes treatment today.DPP-4 Inhibitors: Januvia, Tradjenta and OthersExamples of DPP-4 inhibitors include:Sitagliptin (Januvia)Linagliptin (Tradjenta)These medications generally provide relatively modest glucose lowering.They were used more frequently before SGLT2 inhibitors and GLP-1 medications became widely available.Today, they may still be reasonable for certain people, particularly if someone is already taking one successfully.But when starting a new medication, other classes may be preferred because they can provide additional benefits for the heart or kidneys.Insulin for Type 2 Diabetes in Older AdultsInsulin remains the most powerful medication available for lowering blood sugar.It can also be used in situations where certain other diabetes medications cannot, including in people with serious kidney disease, although the insulin dose may need to be adjusted.But insulin has an important downside:It has the highest risk of hypoglycemia.Insulin can also:Cause weight gainRequire injectionsRequire more frequent blood sugar monitoringMake diabetes treatment considerably more complicatedFor these reasons, we generally dont turn to insulin first when treating Type 2 diabetes.Long-acting insulin is often simplerThere are several types of insulin, including:Long-acting or basal insulin, such as insulin glargineIntermediate-acting insulinShort-acting or mealtime insulinWhen an older adult with Type 2 diabetes does need insulin, we often prefer to start with a simpler regimen involving long-acting insulin.One advantage of long-acting insulin is that it tends to provide more gradual glucose lowering and does not usually require the same degree of meal-by-meal adjustment.By contrast, short-acting insulin may have to be taken several times per day around meals and often requires much more frequent glucose monitoring.That extra complexity matters in older adults.Carb Counting, Insulin and Memory ProblemsSome people who use short-acting insulin adjust the dose according to how many carbohydrates theyre planning to eat.This can work well for some people.But it requires a fairly complicated set of mental tasks.Someone has to reliably remember:Whether they already took their insulinHow much insulin they tookWhat theyre going to eatHow many carbohydrates are in the mealHow much insulin should be given for those carbohydratesThis can become risky when an older person develops memory loss or cognitive impairment.Carbohydrate counting and complicated insulin regimens are generally most appropriate for older adults whom we are confident can reliably manage the process.If cognition is declining, simplifying diabetes treatment often becomes an important safety goal.A small improvement in A1C may not be worth a large increase in complexity or the risk of an insulin dosing error.Which Diabetes Medications Have the Lowest Risk of Hypoglycemia?One of the most important considerations when choosing diabetes medications for an older adult is the risk of dangerously low blood sugar.Among the medications discussed above:Very low or low hypoglycemia risk when used on their own:MetforminSGLT2 inhibitorsGLP-1 receptor agonistsDPP-4 inhibitorsHigher hypoglycemia risk:Sulfonylureas such as glipizideHighest hypoglycemia risk:InsulinThis doesnt mean that insulin or sulfonylureas should never be used.It means that we should pay special attention to their risks in older adults, particularly in someone who:Has experienced fallsIs frailHas memory problemsEats inconsistentlyHas had previous episodes of hypoglycemiaAre Continuous Glucose Monitors Useful for Older Adults?A continuous glucose monitor, usually called a CGM, uses a small sensor placed under the skin to continuously track glucose levels.Depending on the device, the sensor may remain in place for around 1014 days, and glucose readings can often be viewed on a smartphone or other device.CGMs were initially developed for people with Type 1 diabetes.They can also be useful for some people with Type 2 diabetes, especially those who need multiple doses of insulin.One advantage is that a CGM provides much more information than an occasional finger-stick glucose reading.It can help show:What happens to blood sugar after certain foodsHow physical activity affects glucoseWhether blood sugar is dropping unexpectedlyHow the glucose level changes after a medication adjustmentCGMs can also potentially help answer a question that comes up frequently in geriatrics.Suppose an older person has episodes of weakness or dizziness.Is the problem:Low blood sugar?Low blood pressure?Something else?Continuous glucose information can sometimes help clarify whether hypoglycemia is involved.CGMs may also be useful for a limited period when someone is starting or changing diabetes treatment.At the same time, not everyone wants or benefits from having constant glucose information.Some people find it very useful and motivating.Others find it intrusive or anxiety-provoking.So the best glucose monitoring approach depends on the individual.How Can an Older Adult Tell If Diabetes Treatment Is Going Well?Its easy for diabetes treatment to become very focused on numbers.But a good A1C isnt the only thing that matters.In geriatrics, we also want to know whether the treatment is helping the older person stay safe, functional, and able to do the things that matter to them.Useful questions include:Am I having episodes of low blood sugar?Is my treatment becoming difficult to manage?Am I having medication side effects?Have I started falling?Am I having unexplained episodes of weakness or confusion?Am I losing weight or muscle unintentionally?Is memory loss making the medication regimen harder to manage?Is diabetes treatment interfering with eating or quality of life?Does this treatment still make sense given my current overall health?This last question is especially important.A diabetes treatment plan that made perfect sense when someone was 60 may not still be ideal when theyre 80.As people age and their health changes, their diabetes medications and treatment goals should be periodically reconsidered.What to Ask Your Health Provider About Diabetes TreatmentIf you or an older relative is being treated for Type 2 diabetes, consider asking:What A1C goal makes sense for me now?How much benefit am I likely to get from lowering my A1C further?Am I at risk of hypoglycemia?Could any of my medications be causing low blood sugar?Do I still need all of my diabetes medications?Could my treatment be simplified?Would a diabetes medication with a lower risk of hypoglycemia be appropriate?Do my heart or kidney problems affect which medication would be best?If Im taking a GLP-1 medication, should we be monitoring weight, nutrition, strength, or muscle loss?Would a continuous glucose monitor be helpful?Does my current diabetes treatment still fit my overall health and priorities?And if an older person is developing frailty, falls, memory problems, or difficulty managing a complicated insulin regimen, another very important question is:Could we be treating the diabetes more aggressively than necessary?The Bottom Line on Treating Type 2 Diabetes in Older AdultsWhen it comes to diabetes treatment in later life, the goal should not simply be to achieve the lowest possible blood sugar or A1C.Instead, good diabetes care involves balancing the long-term benefits of lowering blood glucose against the immediate risks, side effects, and burden of treatment.For many older adults:Lifestyle measures remain an important foundation of diabetes treatment.Metformin is often a useful first medication.SGLT2 inhibitors can be particularly useful for certain people with heart or kidney disease.GLP-1 medications can provide significant benefits, but weight and muscle loss deserve extra attention in later life.Sulfonylureas require more caution because they can cause hypoglycemia.Insulin is very effective but carries the greatest risk of dangerously low blood sugar.Complicated insulin regimens may become inappropriate if memory or functional abilities decline.Continuous glucose monitors can be helpful for selected older adults.Diabetes treatment goals should be reconsidered as an older persons health changes.Most importantly, diabetes treatment should evolve as the person ages.The medication plan and blood sugar goals that were appropriate ten or twenty years ago may no longer provide the best balance of benefits, risks, and quality of life today.