Viagra faces rise of rival

VIAGRA sales are facing strong competition from longer-lasting Cialis as the rival impotence drugs go head to head for dominance of the multi-billion euro market worldwide.

Viagra has already been overtaken by Cialis in South Africa with Lilly claiming 45% of the €70 million rand market on one of the most competitive markets for impotence treatments in the world.

Sales of Viagra, the world’s best-selling male impotence drug, fell in each of the five months since Eli Lilly and Icos unveiled their longer-lasting Cialis pill.