Open Systems Pharmacology

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Reliable, powerful and easy-to-use modeling & simulation tools for pharmaceutical and other life-sciences applications. Qualified and accepted by the scientific community including academia, regulatory agencies and industry. Available free to everyone.

Essentials

Download OSP Suite

Explore the full functionality of the OSP suite. PBPK, PBPK/PD, QSP – the OSP Suite gives you the flexibility to build it all without having to start from scratch.

Forum

Have your questions answered or provide answers to others. The Forum is a great way to stay up-to-date on the community buzz around OSP.

Documentation

Need to find out how to use a feature? Looking to understand the inner workings of the model? Here you’ll find the extensive OSP manual and qualification documents.

News & Release

Save the Date: OSP Community Conference 2026

In Beerse, Antwerp September 24th and 25th

Open Systems Pharmacology Suite - Version 12 Update 2

We are pleased to announce the new release of the OSP Suite Version 12 Update 2 which is now available for download.

WORKSHOP AT ACOP COLORADO.

Join ESQlabs at the ACoP Conference in Colorado Building Scalable PBPK-QSP Models - Modularization in MoBi for OSP Suite V12.

Ready to take the plunge? Download

: The practice of non-sexual nudity in social settings, emphasizing dignity and body positivity.

: Naturists frequently find that communal nudity reduces body shame and improves mental well-being.

Going on a naturist trip with a friend can make the initial vulnerability feel like a shared adventure.

Embarking on a naturist holiday with a friend, especially as a "newbie," is a liberating experience that often challenges societal norms and strengthens bonds. Whether you are visiting a dedicated resort like Vritomartis in Crete or exploring a clothing-optional beach, the transition to social nudity is smoother when shared with a trusted companion. Understanding the Naturist Lifestyle

Naturist Holidays at Vritomartis Nudist Resort in Crete, Greece

Naturism is more than just being naked; it is a lifestyle focused on self-acceptance, harmony with nature, and respect for others. For many, the first "good holiday" as a naturist involves shedding the anxiety of "visual comparisons" and realizing that, without clothes, everyone is equal.

: Without the status symbols of clothing or jewelry, social barriers often disappear. Navigating the Experience with a Friend

Publications & Models

Models

Glucose Insulin Model

Scientifically exciting for diabetes researchers. Technically exciting for everyone with PBPK models of glucose, insulin, and glucagon coupled through non-mechanistic PD as well as systems pharmacology PD models.

Publications

Journal Publications

Growing list of scientific journal publications that relates to OSP or describes work with PK-Sim® or MoBi®. Add your own contributions and label them or others appropriately to further grow and structure this database.

Take a look at all our models Browse

Naturistin Good - Holiday Lea Shower Lea N Friend New Better

: The practice of non-sexual nudity in social settings, emphasizing dignity and body positivity.

: Naturists frequently find that communal nudity reduces body shame and improves mental well-being. naturistin good holiday lea shower lea n friend new

Going on a naturist trip with a friend can make the initial vulnerability feel like a shared adventure. : The practice of non-sexual nudity in social

Embarking on a naturist holiday with a friend, especially as a "newbie," is a liberating experience that often challenges societal norms and strengthens bonds. Whether you are visiting a dedicated resort like Vritomartis in Crete or exploring a clothing-optional beach, the transition to social nudity is smoother when shared with a trusted companion. Understanding the Naturist Lifestyle Embarking on a naturist holiday with a friend,

Naturist Holidays at Vritomartis Nudist Resort in Crete, Greece

Naturism is more than just being naked; it is a lifestyle focused on self-acceptance, harmony with nature, and respect for others. For many, the first "good holiday" as a naturist involves shedding the anxiety of "visual comparisons" and realizing that, without clothes, everyone is equal.

: Without the status symbols of clothing or jewelry, social barriers often disappear. Navigating the Experience with a Friend

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