Hoorah for caffeine, the oil that keeps the wheels of the mighty NHS juggernaut turning. At my place of work, Maxwell House is provided in large catering tins that last approx 24hrs!! Despite the fact that it tastes somewhat like sweet battery acid and gives us the fear of perf GI's. I have had countless conversations about half life of caffeine, and optimum doses needed between breaks to acheive optimum working alertness balance against side effects of stomach cramps and shakes that effect patient safety. Have you tried Rocket Fuel, a high caffeine instant coffe with added Guarana. Tastes like s*** but does the job a treat. Heres for a self medicating NHS workforce.