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What is simulated intestinal fluid USP (with or without enzyme)?

This post describes simulated intestinal fluid USP (with and without enzyme)
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A comparison of USP-SIF (sp) with biorelevant FaSSIF medium

This post compares and contrasts USP SIF with FaSSIF medium
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What are Gastric fluid, simulated, TS (Test Solution) and USP-SGF (sp)?

This post explains what are Gastric fluid, simulated, TS and USP-SGF (sp).
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USP <1236>: Solubility Measurements Chapter

This post summarises USP Chapter <1236>
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What is equilibrium solubility of a drug?

This post explains equilibrium solubility of a drug substance in a test medium
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What is supersaturation of a drug substance?

This post explains supersaturation of a drug substance
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What is the difference between a drug product and a drug substance?

If you're developing an NCE (new chemical entity) or generic drug it’s helpful to understand the difference between drug substance and drug product.
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What is a High-Fat FDA meal?

A High-Fat FDA meal is a standardized meal that is orally administered along with a drug product to create fed state/condition in human clinical trials.
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How can food affect drugs in the fed stomach?

In patients with a healthy stomach, a high-fat meal can have multiple effects on the stomach and its fluids.
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The BCS (Biopharmaceutical Classification System)

The ‘BCS’ is a systematic way of classifying orally administered pharmaceutical drugs based on water solubility and drug permeability.