Nowadays the pharmacy market offers quite effective medications to treat impotence. Cialis (Eli Lilly & Co biotechnological company Icos Corp) is sold practically all over the world already. These yellow pills keep their activity during 24 hours comparing to Viagra effect – 4 hours. This lets the patients make sex more spontaneous choosing the right moment for making love. The pill does not make an effect of a constant sexual excitement and it means that a man may reach erection in response to a sexual stimulation. The studies show that this preparation is effective for 4 men of 5 who suffer from erectile dysfunction.

Viagra has caused a real sensation in the impotence treatment. When it appeared in the pharmacy market several years ago and became a real commercial success for “Pfizer” – the sales volume of the medication formed $1, 74 billions in 2000. The medication is also positioned as the most famous trade mark, though the competitors try to press it back. Apart from Cialis, the companies GlaxoSmithKline Plc and Bayer AG sell one more medication to treat impotence – that is Levitra.

The branch analysts in the Merrill Lynch Company think that new medications should conquer the same popularity as Viagra as 50% of the patients who take Viagra do not apply for another prescription and 25% of them do not reach enough erection. Viagra, Levitra and Cialis act due to blocking of enzyme PDE-5, which influences the blood inflow to penis. Robert Brown, the director of the international marketing of Cialis in Lilly expects more significant widening of the pharmacy market as only 10-15% of 30 millions of Europeans suffering from erectile dysfunction get a treatment at the present time.

The Great Britain government imposed restrictions for Viagra use in 1999 being afraid of cost escalation of the National medical system in case if men who did not suffer from serious diseases would have an easy access to the medication. The pharmaceutical companies also study the possibilities of this class preparations for women who suffer from lack of libido and difficulties in sex.

The FDA’s approval of Cialis (tadalafil) on 21 November 2003.