Provides detailed information on all antipsychotic drugs currently available in the UK.
Olanzapine is a second generation antipsychotic. It is also known by the trade names Zalasta, Zyprexa and ZypAdhera.
You can find detailed information about this drug in the official Patient Information Leaflet (PIL). This includes information on what the medication is for, how to take it, possible side effects and safety information.
This leaflet should come with your medication, usually inside the box. Or you can download a PDF version of the PIL for your medication:
Some drugs come in different forms, such as tablets or liquid. There may be a separate PIL for each form of the drug, as well as for different doses. You should look at the PIL for the form and dose you have been prescribed.
You can also search these websites for your specific drug to find further information and PILs:
If you have any questions about your medication you can:
If you experience any side effects from your drug, you can report them to the MHRA via their Yellow Card scheme. This scheme allows the MHRA to collect information about which drugs cause which side effects and how common they are. This lets drug manufacturers give more accurate information about their medication.
Our pages on antipsychotics have lots more information about this type of medication. This includes how they work, what they are prescribed for and what to know before taking them. It also covers their side effects and withdrawal effects, and lists alternative treatment options.
These pages may also help:
This information was published in September 2020. We will revise it in 2023.
References and bibliography available on request.
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