News Whole class ban on substances is needed to control designer drugs, says UN agency BMJ 2011; 342 doi: https://doi.org/10.1136/bmj.d1450 (Published 04 March 2011) Cite this as: BMJ 2011;342:d1450 Article Related content Metrics Responses Peer review Related articles No related articles found. See more Generics have a chequered recent history BMJ December 05, 2016, 355 i6527; DOI: https://doi.org/10.1136/bmj.i6527 Pfizer could face large fine over pricing of generic phenytoin BMJ November 28, 2016, 355 i6401; DOI: https://doi.org/10.1136/bmj.i6401 Five thousand dead and counting: the Philippines’ bloody war on drugs BMJ November 28, 2016, 355 i6177; DOI: https://doi.org/10.1136/bmj.i6177 Zika related microcephaly may appear after birth, study finds BMJ November 23, 2016, 355 i6333; DOI: https://doi.org/10.1136/bmj.i6333 Babies with microcephaly in Brazil are struggling to access care BMJ November 16, 2016, 355 i6157; DOI: https://doi.org/10.1136/bmj.i6157