Type 2 diabetes

Audience: Patients and providers
Status: Clinical guide · patient + provider
Last updated: 2026-03-09

1. Clinical overview

Type 2 diabetes is a progressive metabolic disease driven by insulin resistance and beta-cell dysfunction, with management priorities extending beyond A1C to cardiorenal protection and complication prevention.

2. Common causes and risk factors

Insulin resistance with gradual beta-cell dysfunction.
Risk factors: excess adiposity, family history, prediabetes, sleep disruption, and low activity.
Contributors: social determinants, food insecurity, and medication adherence barriers.

3. Typical symptoms

Polyuria, polydipsia, blurry vision, fatigue, recurrent infections; may be asymptomatic early.

4. Diagnosis and evaluation

Confirm diagnosis with guideline-based history, exam, and indicated testing.
Screen for severity, complications, and high-risk comorbid conditions.
Identify social or access barriers that could affect treatment success.

5. Treatment (non-pharmacologic)

Nutrition pattern that lowers glycemic load and supports sustainable weight loss.
150+ minutes/week aerobic activity plus resistance training 2–3 times/week.
Sleep optimization, tobacco cessation, and structured self-monitoring education.

6. Treatment (pharmacologic)

First-line therapy often starts with metformin if tolerated and appropriate.
Cardiorenal priorities commonly use SGLT2 inhibitors such as empagliflozin or dapagliflozin and GLP-1 receptor agonists such as semaglutide, dulaglutide, or tirzepatide when indicated.
Additional agents may include basal insulin, prandial insulin, sulfonylureas such as glipizide, DPP-4 inhibitors such as sitagliptin, or TZDs such as pioglitazone depending on A1C, hypoglycemia risk, weight goals, and comorbidity.

7. Monitoring and follow-up

A1C every ~3 months until stable, then every 6 months.
Renal function, UACR, blood pressure, lipids, eye/foot screening, and hypoglycemia risk.

8. Practical counseling points

Give patients a clear “what to do today / when to call / when to seek urgent care” plan.
Use teach-back to confirm understanding of treatment goals and medication instructions.
Simplify regimens when possible to improve adherence and outcomes.

9. Red flags and escalation

Escalate care urgently for severe or rapidly worsening symptoms.
Reassess diagnosis if expected response does not occur within the anticipated timeline.

10. Guideline references

American Diabetes Association (ADA) Standards of Care.
KDIGO diabetes and CKD guidance.
ACC/AHA prevention guidance for cardiometabolic risk.

Note: Educational guide only; not a substitute for individualized medical care.