It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
Why do you have to keep taking repeated doses of any given medicine? Well, once you take the medicine, it gets absorbed by the intestine into the blood. The medicine in the blood acts on its target cell and also gets filtered into the nephron. Most medicines don't have transporters in the nephron to reabsorb them from the filtrate. In fact, some transporters actively secrete medicines into the nephron. Therefore, the medicine gets eliminated in the urine and you must take another dosage later.
Unable to believe that any machine can be designed that contains an instruction library which anticipates all the mishaps and glitches of a billion years of evolution without crashing over and over again