When the world was young, life was simple. If someone bright found that a sharpened stick could be used during a hunt to kill animals for food, that's what it was used for. No-one would dream that, in the future, a smaller version would be used as a pen for writing. So it was that the little blue pill started off its life during clinical trials for the treatment of Pulmonary Arterial Hypertension (PAH) - problems in the arteries in the chest. When the accident of excitement among the male participants was noted, a new train of thought left the station. Who would have thought that a mere ten years later, the Italian mafia would be feeding the same medication to racehorses to fix the races. Life has become so much more complicated as time has passed.
