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It's been the butt of jokes all over the world, but 10 years after Viagra first went on sale it's the pill's manufacturers who are laughing all the way to the bank.
Viagra is now the world's best known medical brand name, selling millions of tablets worldwide.
New Zealand market leader Pfizer sells 430,000 tablets each year worth more than $6 million.
Worldwide estimates put the number of Viagra users at a staggering 300 million.
Viagra came on to the Kiwi scene in late 1998 spawning a string of jokes but also transforming relationships of thousands of New Zealand couples.
Latest figures show Kiwi men of all ages use Viagra but the majority are aged over 40 - with up to half of Kiwi men over 40 estimated to experience erectile dysfunction at some point in their lives. But while the drug has changed relationships, has it been for better or worse?
