Answer: Correction of any hormonal abnormality (testosterone replacement for hypogonadism after carefully determining etiology, correction of thyroid dysfunction, maximal glycemic control in diabetes, treatment of hyperprolactinemia with dopamine agonist) Treatment of any underlying systemic disorders, including depression (SSRIs can cause ED but may help to prevent premature ejaculation) Mechanical devices (rings, vacuum pump device): cumbersome [...]

Answer: The most important step is to reverse the underlying organic etiologies and discontinue any offending medications, if possible. Reference: Basa ALP, Afsharkharaghan H (Zollo A, ed): Endocrinology in Medical Secrets, 3rd ed. 2001.