Type 2 Diabetes: A GP Guide

Type 2 Diabetes: A GP Guide

Type 2 diabetes affects around 1.3 million Australians and is one of the fastest-growing chronic diseases in the country. The good news: early diagnosis and good management can prevent most of its serious complications. This guide covers symptoms, diagnosis, and how your GP helps you live well with diabetes.

What Is Type 2 Diabetes?

Type 2 diabetes is a condition where your body either does not produce enough insulin or cannot use insulin effectively. Insulin is the hormone that lets glucose (sugar) from food enter your cells for energy. Without enough working insulin, glucose builds up in the blood, causing high blood sugar levels.

Over time, high blood sugar damages blood vessels, nerves, eyes, kidneys, and the heart — but most of this damage is preventable with good control.

Symptoms of Type 2 Diabetes

Type 2 diabetes often develops slowly, and many people have no symptoms in the early stages. Common symptoms when they do appear include:

  • Increased thirst and frequent urination
  • Extreme tiredness or fatigue
  • Unexplained weight loss (despite eating normally)
  • Blurred vision
  • Slow-healing cuts and wounds
  • Frequent infections (thrush, urinary tract infections)
  • Tingling or numbness in hands or feet
  • Darkened skin folds (acanthosis nigricans)

Many people are diagnosed during a routine health check before symptoms appear — which is why regular GP visits matter.

Who Is at Risk?

  • Age 45+ (or 35+ for Aboriginal and Torres Strait Islander people)
  • Overweight or obese (especially abdominal obesity)
  • Family history of type 2 diabetes
  • History of gestational diabetes
  • Polycystic ovary syndrome (PCOS)
  • Sedentary lifestyle
  • High blood pressure or cholesterol
  • Smoking
  • Poor sleep or obstructive sleep apnoea

If you have any of these risk factors, ask your GP about the AUSDRISK questionnaire and blood glucose testing.

Diagnosis: What Tests Are Used?

  • HbA1c (glycated haemoglobin): Shows average blood glucose over the past 3 months. HbA1c of 6.5% (48 mmol/mol) or higher on two occasions confirms diabetes. Between 5.7–6.4% (39–47 mmol/mol) indicates pre-diabetes.
  • Fasting plasma glucose: Above 7.0 mmol/L after an overnight fast indicates diabetes.
  • Oral glucose tolerance test (OGTT): Blood tests after drinking a sugar solution. Used in pregnancy and borderline cases.
  • Random plasma glucose: 11.1 mmol/L or higher with symptoms confirms diabetes.

Your GP will discuss the best test for you. If a first test is positive, it is usually repeated on a separate day to confirm.

Pre-Diabetes: A Warning and an Opportunity

Pre-diabetes (HbA1c 5.7–6.4%, or impaired fasting glucose) is a warning sign but also a major opportunity. Around 25–50% of people with pre-diabetes will progress to type 2 diabetes within 5 years if nothing changes — but lifestyle intervention can prevent or delay progression by up to 60%.

Lifestyle Management

  • Diet: Lower-carbohydrate, Mediterranean-style, or plate method eating. Work with an accredited dietitian under your care plan.
  • Weight loss: Even a 5–10% reduction can significantly improve blood sugar, blood pressure, and cholesterol.
  • Physical activity: 150 minutes of moderate aerobic activity per week, plus 2 strength sessions. Walking, swimming, and cycling are all excellent.
  • Quit smoking: Smoking dramatically increases diabetes complications.
  • Manage stress and sleep: Poor sleep and chronic stress raise blood sugar.
  • Limit alcohol: Less than 10 standard drinks per week.

Medications for Type 2 Diabetes

Many people with type 2 diabetes need medication in addition to lifestyle changes. Your GP will discuss options, which may include:

  • Metformin: Usually the first-line medication. Safe, effective, and has additional cardiovascular benefits.
  • SGLT2 inhibitors: Newer class that lowers glucose and protects the heart and kidneys.
  • GLP-1 receptor agonists: Injectable medications that lower glucose and support weight loss.
  • DPP-4 inhibitors: Tablets, well-tolerated, modest glucose lowering.
  • Sulfonylureas: Older class, effective but can cause hypoglycaemia.
  • Insulin: May be needed if other medications are insufficient, or at times of stress/illness.

GP Management Plans for Diabetes

Diabetes is a classic chronic disease suited to a structured GP Management Plan. This provides Medicare-subsidised regular reviews, HbA1c monitoring, foot checks, eye checks, and coordinated care with a diabetes educator, dietitian, podiatrist, and exercise physiologist through a Team Care Arrangement.

Ask your GP about the “Diabetes Cycle of Care” — a structured annual review that ensures nothing is missed.

Complications and Why Good Control Matters

Poorly-controlled type 2 diabetes can lead to:

  • Heart attack and stroke
  • Kidney disease and dialysis
  • Eye disease and blindness
  • Foot ulcers and amputation
  • Nerve damage (diabetic neuropathy)
  • Increased infection risk

Good control — typically HbA1c below 7% (53 mmol/mol), blood pressure below 130/80, LDL cholesterol below 2.0 — prevents or delays most complications.

Find a Family Doctor Clinic Near You

Whether you need a first-time diagnosis or ongoing diabetes care, Family Doctor GPs provide comprehensive support. Book a long consultation if you would like a full diabetes review.

Find a Clinic & Book an Appointment

Frequently Asked Questions

Can type 2 diabetes be reversed?

In some people, especially those diagnosed recently and who are overweight, significant weight loss (often 10–15%) and intensive lifestyle change can put type 2 diabetes into “remission” where HbA1c returns to normal without medication. This is not a cure — diabetes can return with weight regain — but it can be maintained for years.

Do I need to avoid all sugar?

No. The key is balance — moderate carbohydrate, distributed through the day, with fibre, protein, and healthy fats. A diabetes educator or dietitian (accessible through a Team Care Arrangement) can help you build a personalised eating plan.

How often should I check my blood glucose at home?

It depends on your medications. If you are on metformin only, regular finger-prick testing is usually not needed. If you are on insulin or sulfonylureas, daily monitoring is important. Ask your GP what is right for you.

Are blood glucose monitors bulk billed?

Medicare does not cover home glucose monitors directly, but diabetes-related consultations are Medicare-rebated, and many Family Doctor clinics bulk bill care plans. The National Diabetes Services Scheme (NDSS) provides subsidised test strips and other supplies to registered diabetics.