A Recognized Screening Library of 1280 approved drugs

A team of medicinal chemists and pharmacists selected a collection of 1280 off-patent drugs with high chemical and pharmacological diversity, as well as known bioavailability and safety in humans.


    PRESTWICK CHEMICAL A unique collection of 1280 off-patent small molecules, 95% approved drugs (FDA, EMA and other agencies)
    PRESTWICK CHEMICAL High chemical and pharmacological diversity
    PRESTWICK CHEMICAL Specially designed to increase potential “high-quality” hits - Mean MW: 360
    PRESTWICK CHEMICAL Over the past 19 years, “hit-likeness” and “hit-workability” have been reported by users in
    PRESTWICK CHEMICAL A constant quality control ensures high purity and stable compounds

    Therapeutic class distribution
    Example blog post alt

    Example blog post alt


    PRESTWICK CHEMICAL In powder form, 10-100mg with cherry-picking options
    PRESTWICK CHEMICAL In DMSO at 10mM, ready for screening (100µL – 1mL)

PCL Premium PCL Full Premium
Formulation 1280 molecules 1280 molecules
Format 10 mM in DMSO 10 mM in DMSO
Stability 5 years at -20°C 5 years at -20°C
Quantity 100 µL / compound 100 µL / compound
regularly updated
Electronic file
(xls, sdf, rdf, db, pdf)
Electronic file
(xls, sdf, rdf, db, pdf
Plate and plate map customization 96 well plates (Greiner)
  • 96 or 384 well plates


  • special mapping possibility
  • Hit Re-supply Not included FREE: up to 20 compounds at 10mg
    Hit follow-up Not included FREE Med Chem assistance
      PRESTWICK CHEMICAL Database annotation includes target, therapeutic class/effect, side effects, patent and ADMET information
      PRESTWICK CHEMICAL Re-supply of any hit-compound up to 100 mg
      PRESTWICK CHEMICAL Entry price: 9400 EUR /USD


      PRESTWICK CHEMICAL Assay validation
      PRESTWICK CHEMICAL Repurposing/ repositioning
      PRESTWICK CHEMICAL Start of new optimization process
      PRESTWICK CHEMICAL Finding of stem cell growth modulators

    PCL posters

    presented at international meetings

    Prestwick Chemical Library®:

      The Prestwick Chemical Library® (PCL) is Prestwick’s flagship product dedicated to screening. It is a collection of 1280 molecules comprising mostly approved drugs (FDA, EMEA and other agencies) selected for their high chemical and pharmacological diversity. These off-patent drugs have known bioavailability and safety data in humans are available. The PCL was designed to reduce the risk of "low quality" hits and therefor the cost of the initial screening, and appears to be an efficient smart library for hit discovery.

    Prestwick Chemical Library®:

      The ensuing project was designed to optimize the benefits of the PCL through pharmacophore modelling. The pharmacophore characterization of the library was obtained by applying a multi-step approach, first starting with a clustering analysis based RDF pharmacophore similarity. The 1280 compounds of the PCL were found to be clustered in 385 groups: 217 clusters and 168 singletons were obtained. The aim of this work was to generate a model for each cluster and subsequently use these models for extending the PCL and have a pharmacophoric representation of the library. After evaluation on the Zinc 2 database, a random selection of pharmacophore models underwent an external validation process by using DrugBank3 and ChEMBL4 databases.

    Prestwick Chemical Library®:

      A set-up for parallel sleep-wake recording and sleep drug screening larval zebrafish has been performed with the Prestwick Chemical Library

    smart chemical screening libraries