The over-the-counter diarrhoea drug Elotrans has become harder and harder to find in Germany because of its popularity as an anti-hangover medicine thanks to hype on social media, pharmacists say. “There is a delivery bottleneck because the demand is so great,” said Stefan Fink, board member of the Federal Union of German Associations of Pharmacists. Elotrans is currently not available from many wholesalers, Fink said, meaning the drug cannot be found on store shelves and is frequently sold out online, too. For months, the drug manufactured by the German pharmaceutical company STADA, which spe…