Transparency of trial information

AstraZeneca has a long-standing commitment to making information about our clinical research publicly available to enhance the scientific understanding of how our medicines work and in the medical interest of patients.

We publish information on the registration and results of all new and ongoing AstraZeneca sponsored clinical trials for all products in all phases, including marketed medicines, drugs in development and drugs whose further development has been discontinued. We post results, irrespective of whether they are favourable or unfavourable to AstraZeneca.

From February 2013, we have voluntarily disclosed the research protocol for our clinical trials on astrazenecaclinicaltrials.com once a manuscript relating to results of the relevant trial on an investigational or approved product is published in a peer-reviewed medical journal. The posted protocol includes key sections necessary for evaluating the study, but proprietary information in the protocol is edited before posting. This policy also applies to observational studies published in peer-reviewed journals that have relevance to the efficacy or safety profile of an AstraZeneca product.

We consider requests for patient level data from other parties on a case-by-case basis, following consistent criteria to establish if and how the information provided will be used for valid scientific purposes and to benefit patients.

Calls for ‘open access’ to clinical data raise complex practical, legal and ethical issues around full disclosure of patient information. Decision-makers, as well as academia and industry have a duty to consider all the implications that could arise from such proposals. These include ensuring scientific rigour, safeguarding patient privacy and protecting innovation and medical progress. We are engaging with regulators, legislators, industry, medical and scientific bodies to discuss the issues raised by the proposals to routinely publish full clinical trial and patient data so we can collectively identify practicable solutions that deliver real benefits to medical science and patients.

Trial registration

Since June 2010, trials are registered on the US National Library of Medicine’s website (clinicaltrials.gov) prior to the first patient being enrolled in a trial and to other websites within timelines as required by law. We also post basic information on our own dedicated website, astrazenecaclinicaltrials.com.

Trial results

Results of trials with already marketed medicines are posted within one year of completion. Results of trials with medicines in development are posted within 30 days of first regulatory approval for the new medicine. When a medicine in development has been discontinued, results are published within one year of the public announcement of the decision, unless analysis and interpretation of the data are not sufficiently complete, in which case we post a brief explanation for the delay and the anticipated date when the results will be posted. For marketed medicines and recently approved medicines where we consider there to be good cause to delay posting of results, we will seek necessary approval according to applicable law. Where approved, we post a brief explanation for the delay and the anticipated date when the results will be posted.

Results are posted on the US National Library of Medicine’s website and other sites as required by law. Results of our studies of our small molecule products are also published on our dedicated website. Information is also provided on the International Federation of Pharmaceutical Manufacturers and Association’s portal, which provides a single entry to trial registration and results information across the pharmaceutical industry.

What's next in this section

Annual data

2013 data on our clinical trials activity.

Read more