1Kaufman DW, Kelly JP, Rosenberg L, et al. Recent patterns of medication use in the ambulatory adult population of the United States[J] .JAMA, 2002, 287(3):337.
2Kacew S. Effect of over - the - counter drugs on the unbom child: what is known and how should this influence prescribing?[J].Paediatr Drugs,1999,1(2):75.
3Assemi M, Torres NM, Tsourounis C, et al. Assessment of an online consumer"Ask Your Pharmacist" service[J ]. Ann Pharmacother, 2002, 36(5) : 787.
4Solomon W. Prescription-to-over-the-counter switch criteria[J]. Drug Information Journal, 2002, 36:309
5Changing the legal classification in the United Kingdom of a medicine for human use [ EB/OLI. http://www.mhra. gov.uk/home/idcplg? IdcService = GET_3819&noSaveAs = 1 &Rendition = WEB
