Since they say how in the article, I wonder how long before others try the same thing.
The patient had been taking large doses of sumatriptan - 200 milligrams a day. This had caused a rare condition called sulfhaemoglobinaemia, where sulphur is incorporated into the oxygen-carrying compound haemoglobin in red blood cells.
Plus, some editor isn't doing their job in proof reading for spelling errors in that article.
It's actually spelt sulfhemoglobinemia and hemoglobin