The scandal about Thalidomide was the poor or absent clinical trials that were performed, when it was introduced as a kind of "wonder drug" back in the 1950s. And indeed, it does have some very useful and valuable effects.
As already mentioned, the real danger of thalidomide is that it is teratogenic; Leading to those lasting and horrifying images of "thalidomide babies".
But despite its obvious dangers for pregnant women, Thalidomide remains a valuable treatment option for certain types of diseases; Multiple Myeloma, Breast Cancer and some others, ironically in part because it has anti-angiogenic properties, very valuable in attacking the rate of growth of cancers. It is also an effective anti-pyretic, anti-inflammatory and anti- emetic drug. Its anti-emetic qualities were the reason it was prescribed to pregnant women, to combat morning sickness.
Were it not for its horrible teratogenic qualities, it could indeed be considered a wonder drug.
With respect to its use in Brazil, it has a specific use in the treatment of one of the more common complications of leprosy, the deposition of immune complexes in nodules under the skin, which are very debilitating and painful. other drug treatments - prednisolone, a steroid, or clofazime, have only a limited benefit in the treatment of such recurrent chronic complications and prednisolone has side effect and safety issues if prescribed for too long or at a relatively high dose. These are powerful drugs we are talking about.
Thalidomide outperforms them both - there several high quality papers attesting to this - when it comes to managing this particular complication.It is better tolerated, has less side effects, and is cheaper - all very important considerations when treating large numbers of affected patients in a developing country.More research is still needed, especially into direct comparisons of treatment - thalidomide vs corticosteroids -but right now, thalidomide remains an important tool for treating this complication..
Tight controls are in place - it has to be presribed by a physician, for instance, and all the packs carry both written and visual warnings against its use in pregnant women. Despite this, it is likely that there are some "thalidomide babies" born each year, and that is tragic, a failure of the control system - but that is not sufficient reason not to use the drug for all those patients who gain enormous benefits from it.
The WHO recommendation sounds definitive - but it is at odds with the recommendations of their own expert committee who acknowledged the value of thalidomide in the treatment of this specific complication.
Thalidomide is licenced by the FDA in the US for the treatment of leprosy and cancer, by Australia for use in the treatment of ENL in leprosy and for use in the treatment of cancer, is available on a named patient basis in the UK for leprosy treatment and cancer treatment, and elsewhere around the globe too, including the European Medicines Regulatory Body.
A very good paper was written about this back in 2007 by authors based at the London School of Hygiene and Tropical Medicine, which evaluated the risks and the alternatives, and concluded thalidomide had a place. I have included a link to the paper if you are interested.
http://www.lepra.org.uk/platforms/lepra/files/lr/Sept07/Lep197-215.pdf