For sudden onset erectile dysfunction, first-line medications are phosphodiesterase-5 (PDE5) inhibitors, such as Sildenafil or Tadalafil. Since your blood pressure and hemoglobin levels are normal, these medications are generally safe. However, because this issue started suddenly, it is highly recommended to consult a doctor before starting any treatment. Sudden ED can often be linked to psychological stress, performance anxiety, or other newly introduced medications rather than physical vascular issues. A healthcare provider will help identify the exact cause, rule out any drug interactions, and write the safest prescription for you.