PHARMO Institute Seroquel Safety Study (PHARMO II)

This study has been completed.
PHARMO Institute for Drug Outcomes Research
Information provided by (Responsible Party):
AstraZeneca Identifier:
First received: April 21, 2011
Last updated: August 31, 2011
Last verified: August 2011

The purpose of this observational study is to study specific outcomes of interest in users of quetiapine compared with all other atypical antipsychotics and specifically olanzapine and risperidone. The outcomes of interest are all-cause mortality, failed suicide attempts, extrapyramidal symptoms, diabetes mellitus, hypothyroidism, acute myocardial infarction and stroke. This retrospective cohort study is based on population-based record linkage system (PHARMO RLS) capturing about 2.5 millions residents in the Netherlands.

Major Depressive Disorder
Bipolar Disorder
Generalized Anxiety Disorder

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Retrospective
Official Title: Seroquel Safety Study

Resource links provided by NLM:

Further study details as provided by AstraZeneca:

Primary Outcome Measures:
  • The outcomes of interest will be evaluated by means of relative risk based on incidence rates estimates in users of quetiapine vs corresponding incidence rates in users of comparison drugs [ Designated as safety issue: Yes ]

Enrollment: 18325
Study Start Date: September 2010
Study Completion Date: November 2010
Primary Completion Date: November 2010 (Final data collection date for primary outcome measure)
Quetipine users
All other atypical antipsychotics
All other atypical antipsychotics users
Risperidone users
Olanzapine users


Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population

Population based sample of about 2.5 millions residents in the Netherlands


Inclusion Criteria:

  • Episode of new use of atypical antipsychotics in naïve (not used antipsychotic drugs for a year) users of antipsychotics.

Exclusion Criteria:

  • less than a year of recorded history before the cohort entry date
  • use of multiple antipsychotics concomitantly
  • duration and dose of the antipsychotic drug cannot be determined
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01342120

Sponsors and Collaborators
PHARMO Institute for Drug Outcomes Research
Principal Investigator: Edith Heintjes PHARMO Institute for Drug Outcomes Research
  More Information

No publications provided

Responsible Party: AstraZeneca Identifier: NCT01342120     History of Changes
Other Study ID Numbers: D1443L00085
Study First Received: April 21, 2011
Last Updated: August 31, 2011
Health Authority: Netherlands: Medicines Evaluation Board (MEB)

Keywords provided by AstraZeneca:
atypical antipsychotics

Additional relevant MeSH terms:
Depressive Disorder, Major
Depressive Disorder
Mental Disorders
Mood Disorders processed this record on March 31, 2015