Tadalafil, a further innovation in the treatment of sexual dysfunction.

In recognition of the large number of sufferers of sexual dysfunction worldwide, and the variety of etiologies of the condition, investigation into effective pharmacological agents has been expanded. One method of intervention is inhibition of the phosphodiesterase type 5 (PDE5) enzyme, which has already been exploited with a considerable degree--though not complete--success. A number of new agents that inhibit PDE5 are under development.