Leyden Delta is a pharmaceutical company located in Nijmegen in the Netherlands which specialises in mental health and, in particular, clozapine. Founded in 1996, Leyden Delta supplies clozapine to 32 countries around the world. 


At Leyden Delta, we pride ourselves on our culture of empathy and integrity and, as a result, we are committed to putting patients at the heart of everything we do.

Here in the United Kingdom, we have been delivering dedicated clozapine services to mental health providers for over 15 years and are proud to be instrumental in extending access to clozapine treatment by introducing the generic clozapine formulation, Zaponex® (clozapine) in 2004.


Clozapine is very much central to our business and this can be clearly demonstrated by the provision of our own dedicated pathology services in the form of Magna Laboratories® and the launch in 2019 of the first oro-dispersible clozapine tablet formulations to be made available in the UK.

Leyden Delta B.V.

Unit 5, Chase Industrial Estate,



Tel: +31 (0)24 372 6272

Fax: + 31 (0)24 372 6270


Copyright © 2019 Leyden Delta BV All rights reserved.

 Date of preparation: October 2019

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