Levitraź (vardenafil hydrochloride
trihydrate) was co-developed by
Bayer
Pharmaceuticals and
GlaxoSmithKline as a
challenger in the competitive male impotence pill
market that has been dominated by Viagra since its
launch in 1998.
Levitra is similar to Viagra and Cialis.
They are all PDE-5 inhibitors that
relax the muscles and blood vessels in the penis,
resulting in a natural erection.
Impotence (or erectile dysfunction) is
defined as the inability to achieve or maintain an
erection sufficient for sexual intercourse, and
includes the inability to get an erection as a
result of sexual stimulation or to lose your
erection prior to ejaculation.
Male impotence does not generally include
other symptoms such as lack of libido, inability to
ejaculate or the inability to achieve orgasm.
Levitra was introduced in Europe in early 2003
and received FDA approval for use in the US late in
2003.