The doctors prescribing ... drugs don't know they don't do what they're meant to. Nor do their patients. The manufacturers know full well, but they're not telling. Negative data goes missing, for all treatments, in all areas of science. The regulators and professional bodies we would reasonably expect to stamp out such practices have failed us. Drugs are tested by the people who manufacture them, in poorly designed trials, on hopelessly small numbers of weird, unrepresentative patients, and analysed using techniques that are flawed by design, in such a way that they exaggerate the benefits of treatments. Unsurprisingly, these trials tend to produce results that favour the manufacturer. When trials throw up results that companies don't like, they are perfectly entitled to hide them from doctors and patients, so we only ever see a distorted picture of any drug's true effects. This distorted evidence is then communicated and applied in a distorted fashion. In their 40 years of practice after leaving medical school, doctors hear about what works ad hoc, from sales reps, colleagues and journals. But those colleagues can be in the pay of drug companies often undisclosed " and the journals are, too. And so are the patient groups. And finally, academic papers, which everyone thinks of as objective, are often covertly planned and written by people who work directly for the companies, without disclosure. Sometimes whole academic journals are owned outright by one drug company.