Investigation and inquest
On 24/03/2020 I commenced an investigation into the death of Ian Allen. The investigation concluded at the end of an inquest on 17th August 2020. The conclusion of the inquest was Ian died from clozapine toxicity due to blood levels not being monitored and doses not being adjusted effectively.
Circumstances of the death
Ian collapsed suddenly and unexpectedly at the nursing home where he resided at around 13.50 on 31/12/19. He was taken to the Queen Elizabeth hospital where he was pronounced deceased soon after arrival. He suffered from paranoid schizophrenia and was prescribed clozapine, risperidone and fluoxetine. Toxicology examination after death confirmed a toxic level of clozapine. The most likely cause of the clozapine toxicity is not monitoring the levels sufficiently following cessation of smoking and not adjusting the levels prescribed. A raised clozapine level in February 2019 had not been acted upon which should have resulted in a lower dose which would have avoided his death.
Following a post mortem the medical cause of death was determined to be:
CLOZAPINE TOXICITY
Coroner’s concerns
Birmingham and Solihull Mental Health Foundation Trust
1. In February 2019 a blood test result confirmed that Mr Allen had a high level of clozapine in his blood. This was not acted upon and no further blood test was taken. The clozapine dose was not adjusted as it should have been.
2. There was no system in place at the time to ensure blood test results were escalated to the consultant to ensure action was taken.
3. There was a general lack of understanding at the inquest about the importance of monitoring clozapine levels and how frequently these levels should be monitored.
Department of Health
4. I heard evidence at the inquest that there was a general lack of understanding about clozapine monitoring, which blood test to undertake and the general effect this drug can have on patients. I heard evidence that national guidance was required to clearly set out how frequently clozapine levels should be monitored and what type of blood test should be undertaken.
5. Further education is required of Mental Health practitioners on the importance of clozapine monitoring and level adjustment.