**IMPORTANT: For all Clozaril (CPMS) customers requiring ASI clozapine plasma levels. Please e-mail This email address is being protected from spambots. You need JavaScript enabled to view it., and we will be able to distribute to you the blue, pre-stamp addressed ASI envelopes. This does not affect customers using Denzapine, or registered with DMS.**

Welcome to the ASI Laboratory Portal

 

Here, you can download request forms for clozapine analysis and log on to your secure
ASI laboratory portal account to view sample results for a twelve month period.

An instructional video can be viewed on YouTube here

 

Download request forms for
clozapine analysis, in either
Word or Adobe Acrobat formats
 

Forms

Quick Login

or

 

 

Not yet registered?

Register here

Register

 

NOTICES

 

** NEW 9th January 2026 IMPORTANT: For all Clozaril (CPMS) customers requiring ASI clozapine plasma levels. Please e-mail This email address is being protected from spambots. You need JavaScript enabled to view it., and we will be able to distribute to you the blue, pre-stamp addressed ASI envelopes. This does not affect customers using Denzapine, or registered with DMS.**
16th September 2025 Please note we have updated the upper limit of our therapeutic range (from 0.50 mg/L to 0.60 mg/L) in line with the 15th Edition of the Maudsley Prescribing Guidelines (2025). The lower limit (0.35 mg/L) is unchanged. This range appears on all reports as standard and is also marked on the historical results graph. Please be assured there has been no change to the analytical methodology used at ASI. There may be local Trust guidelines in place already regarding this change. Should you have any questions, please contact the laboratory for information..