The multibillion-pound pharmaceutical industry has spent the last decade developing new drugs which have produced little benefit and caused considerable harm, experts say.
The claim that there is an "innovation crisis" in pharmaceuticals because of the difficulty and expense of discovering new drugs is a myth fostered by an industry whose chief focus is on marketing, they add.
Counter to drug industry claims that the pipeline of new drugs is running dry, the number of new drugs being licensed each year has remained at between 15 and 25. But most involve minor tweaks to existing drugs, designed to grab a slice of an existing market rather than offering genuine therapeutic innovation.
Independent reviews suggest 85 to 90 per cent provide little benefit over existing treatments with some, such as Vioxx, the painkiller, and Avandia, the diabetes drug, causing serious side effects which led to their withdrawal in Europe.
Writing in the British Medical Journal, Professor Donald Light from the University of Medicine of New Jersey and Joel Lexchin from York University in Toronto say the situation has remained the same for 50 years. The incentives for drug development are wrong and have skewed the behaviour of the industry.