ED affects up to half of men with type 2 diabetes. Can better blood sugar control help? This guide explains what 2025-2026 studies show, why ED tablets can work less well when HbA1c is high, what is known about metformin, GLP-1 and other diabetes medicines, a 10-step plan to discuss with your doctor, and the safety rules for ED medicine.

Over 40 million Americans have diabetes — 90 to 95 percent is Type 2 — and more than 1 in 4 do not know they have it. This complete guide covers all Type 2 diabetes symptoms, the HbA1c and fasting glucose diagnostic thresholds, the DiRECT trial evidence for lifestyle reversal, the full step-up treatment pathway from Metformin to GLP-1 agonists, and the critical connection between Type 2 diabetes and erectile dysfunction in men.