Type 2 diabetes is one of the most common long-term health conditions in the world. It develops when the body cannot use insulin properly.
Insulin is a hormone made by the pancreas that helps move sugar from the blood into the body’s cells, where it is used for energy.
When insulin does not work well, sugar stays in the bloodstream instead of entering the cells. Over time, high blood sugar can damage the heart, kidneys, eyes, nerves, and blood vessels if it is not controlled.
The first step in treating type 2 diabetes is usually making healthy lifestyle changes. Eating a balanced diet, being physically active, maintaining a healthy weight, and getting enough sleep can all help lower blood sugar levels. However, many people also need medicine because lifestyle changes alone are not enough to keep blood sugar within a healthy range.
Over the past two decades, researchers have developed several new diabetes medicines. Doctors now have many safe and effective treatment options and can choose the medicines that best match each person’s health needs.
For most people, metformin is the first medicine doctors prescribe. Metformin works by reducing the amount of sugar made by the liver and helping the body’s cells respond better to insulin. It has been used for many years and has one of the strongest safety records of any diabetes medicine.
Large studies, including the United Kingdom Prospective Diabetes Study, found that metformin lowers blood sugar, slightly reduces body weight, and may also lower the risk of heart attack.
It is also inexpensive, making it the first choice for many patients. Some people develop mild stomach upset, nausea, or diarrhea when they first start taking it, but these side effects often improve after a few weeks.
If metformin alone cannot control blood sugar, doctors often add another medicine. One popular group is called SGLT2 inhibitors. Medicines in this group include empagliflozin and dapagliflozin. These tablets help the kidneys remove extra sugar from the body through urine.
Research has shown that they not only improve blood sugar control but also protect the heart and kidneys. In people who already have heart disease, these medicines reduce the risk of being hospitalized for heart failure by about 30 percent. The most common side effects include needing to urinate more often and a slightly higher chance of yeast infections.
Another important group is called GLP-1 receptor agonists. Medicines such as semaglutide and liraglutide copy a natural hormone made in the gut after eating. They help the pancreas release insulin when blood sugar rises, slow the emptying of the stomach, and reduce appetite. Because people feel full for longer, many also lose weight.
Clinical studies have shown that semaglutide can lead to major weight loss while improving blood sugar control. Some people even achieve diabetes remission after significant weight loss.
These medicines also reduce the risk of heart attack and stroke in people with diabetes and heart disease. The most common side effect is nausea during the first few weeks of treatment, and they can be more expensive than older medicines.
Another option is DPP-4 inhibitors, such as sitagliptin. These medicines help the body keep its own GLP-1 hormone active for longer. They lower blood sugar without usually causing weight gain or low blood sugar.
However, they are generally less powerful than GLP-1 receptor agonists or SGLT2 inhibitors. Studies show they are safe for the heart and kidneys, although they do not provide the same strong protective benefits.
Some older medicines are still useful today. Sulfonylureas, such as gliclazide, help the pancreas produce more insulin and lower blood sugar quickly. However, they can cause low blood sugar and weight gain. Another older group, called thiazolidinediones, includes pioglitazone.
These medicines improve the body’s response to insulin but may cause ankle swelling, weight gain, or increase the risk of bone fractures in some people. Doctors may still prescribe these medicines when newer drugs are not suitable or are too expensive.
Some people eventually need insulin injections because their pancreas no longer produces enough insulin. Basal insulin is usually given once a day to keep blood sugar steady between meals and overnight.
Insulin remains the most powerful treatment for lowering blood sugar, but doses must be carefully adjusted to avoid blood sugar dropping too low. Many people use insulin together with metformin or other diabetes medicines.
There is no single diabetes medicine that is best for everyone. Doctors consider many factors, including blood sugar levels, body weight, heart health, kidney function, other medical conditions, cost, and personal preferences before choosing treatment. Many patients benefit from taking two or more medicines that work in different ways.
Modern diabetes treatment has improved greatly over the past 20 years. With regular check-ups, healthy lifestyle habits, and the right combination of medicines, most people with type 2 diabetes can successfully control their blood sugar and greatly reduce their risk of serious complications.
If you care about diabetes, please read studies about the cooking connection between potatoes and diabetes, and low calorie diets may help reverse type 2 diabetes.
For more health information, please see recent studies about protein power: a new ally in diabetes management, and pineapple and diabetes: A sweet surprise.
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