Greater Glasgow and Clyde Medicines

Latest Medicines Updates & News -2024

Clozapine supply and missed doses in acute

Posted: Friday, May 17, 2024

Category - Medicines Update

  • Acute hospital sites in NHSGGC do not stock clozapine.
  • Clozapine is generally supplied from Leverndale Pharmacy.
  • Leverndale Pharmacy should be contacted (including out of hours) when patients on clozapine are admitted to an acute hospital to inform of admission, confirm dose and arrange supply (if required). Leverndale Pharmacy should also be contacted when patients are discharged.
  • If a patient misses clozapine for more than 48 hours, it must be re-titrated to their original dose on advice of the mental health (MH) team.
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Clozapine and risk of life-threatening constipation

Posted: Friday, May 17, 2024

Category - Medicines Update

  • Constipation is a very common adverse effect of clozapine treatment
  • Mortality rates associated with complications from clozapine-induced constipation are higher than the risk of fatal agranulocytosis
  • The risk of clozapine-induced constipation is highest in the first few months of treatment
  • If symptoms suggestive of obstruction emerge, clozapine should be stopped and referral made to mental health services (MHS) for advice
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Clozapine and cytotoxic treatment

Posted: Friday, May 17, 2024

Category - Medicines Update

  • The side effect profile of clozapine means it is subject to mandatory processes and monitoring which are intended to ensure patient safety.
  • Concurrent use of medications known to cause neutropenia are contraindicated with clozapine.
  • In the event of an individual prescribed clozapine requiring cytotoxic treatment, a special treatment plan must be established to manage the contraindicated combination and allow clozapine treatment to continue.
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