How do you treat male impotency problems?

Erectile Dysfunction: I assume you're referring to erectile dysfunction (if not, please re-post your question & be more specific as impotency is vague term). Before discussing treatment, need to uncover cause. Stress, depression, medications, diabetes, tobacco, etc. Viagra (sildenafil) & its competitors are very effective, albeit expensive. Several forms of alprostadil are available, too. Don't forget vacuum pumps.