Protection of the title of Doctor
In June 2009, the MP signed Early Day Motion 1635, a call for the protection of the title of doctor to avoid confusion caused by the use of the term doctor by practitioners of complementary medicine. 
Janet Dean signed the February 2009 Early Day Motion 754: MMR Vaccine and the Media supporting the use of the MMR vaccine. The motion expressed disappointment with the reporting of the vaccine by Jeni Barnett on her LBC radio show in January 2009, and expressed the hope that future reporting of the issue of MMR would be less sensationalist and more evidence-based.
In May 2008 in the abortion amendments to the Human Fertilisation and Embryology Bill (now Act), Janet Dean voted to keep the current time limit of 24 weeks in line with the scientific and medical consensus.
Response to sacking of Professor David Nutt
In an article on her website, Dean wrote in response to Alan Johnson's sacking of David Nutt that "Prof Nutt was not sacked because the Government disagreed with his advice. Independent scientific advisers are essential to inform Ministers in many policy areas". She continued "Prof Nutt was dismissed because of his failure to recognise that as Chair of the Advisory Council on the Misuse of Drugs his role was to advise, not to undermine Government policy". She concluded "While advisers may differ in their opinions, the Government has a duty to protect young people and communities from the effects of drug misuse.".
Libel Law Reform
In December 2009, Janet Dean signed Early Day Motion 423 calling for a reform of the English libel law. The motion noted that human rights activists, scientists, writers and journalists are currently prevented from publishing, and the public prevented from reading, matters of strong public interest due to the chilling effect of the law.
The motion was tabled following the recent formation of Libel Reform Coalition, which has the backing of Index on Censorship, English PEN and Sense about Science. Sense about Science have been campaigning in defense of a member of its board of trustees, author and journalist Simon Singh, who has been sued for libel by the British Chiropractic Association. They issued a statement entitled "The law has no place in scientific disputes".
In January 2010, Janet Dean signed Early Day Motion 524: Recognising Climate Change which states that "this House agrees that climate change is happening and is man-made" and calls this statement a "fact, which has the support of the overwhelming majority of the scientific community".