Men in the US and Canada concerned about persistent sexual side effects "coined the phrase 'post finasteride syndrome', which they say is characterized by sexual, neurological, hormonal and psychological side effects that can persist in men who have taken finasteride for hair loss or an enlarged prostate".   In 2012, a health advocacy group called the Post-Finasteride Syndrome Foundation was formed with the primary goal of finding a cure for the reported syndrome and a secondary goal of raising awareness.  According to the company's 1Q2016 financial filing, Merck is a defendant in 1,385 product liability lawsuits which have been filed by customers alleging they have experienced persistent sexual side effects following cessation of treatment with finasteride. 
Thalidomide has been used by Brazilian physicians as the drug of choice for the treatment of severe ENL since 1965, and by 1996, at least 33 cases of thalidomide embryopathy were recorded in people born in Brazil after 1965.  Since 1994, the production, dispensing, and prescription of thalidomide have been strictly controlled, requiring women to use two forms of birth control and submit to regular pregnancy tests. Despite this, cases of thalidomide embryopathy continue,   with at least 100 cases identified in Brazil between 2005 and 2010.  million thalidomide pills were distributed throughout Brazil in this time period, largely to poor Brazilians in areas with poor access to healthcare, and these cases have occurred despite the controls.