It is very common for diabetes and high blood pressure to affect blood circulation and cause erectile dysfunction. Fortunately, highly effective treatments are available. Oral medications known as PDE5 inhibitors, such as generic sildenafil, tadalafil, and vardenafil, are the standard first-line options that help improve blood flow. Because you have high blood pressure, it is very important to consult your healthcare provider before starting these. They are generally safe but can interact dangerously with certain medications, particularly nitrates used for chest pain. Your doctor will review your current prescription list to ensure you receive a safe and customized treatment plan.