Last year, 19,900 men aged 20 to 39 collected medication for erectile dysfunction. In 2014, the figure was just over 6,600.
"We don't really know why. There are no studies, only theories," Anastasios Fylaktos, a doctor at Karolinska University Hospital, told the newspaper.
One explanation may be that the patents for some popular drugs expired about ten years ago. This has led to a drop in the price of potency drugs.
Anastasios Fylaktos believes that online sales of potency drugs without a prescription have also increased. But she points out that there are major risks with buying medicines that way.
You don't know what they contain or in what environment they are produced, she says.
