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• Classes

• Definitions

• See also

• References

• Further reading

• External links

According to the Biopharmaceutics Classification System (BCS) drug substances are classified to four classes upon their solubility and permeability:cite-ref-mehta-2016-1-1[1]

• Class I – high permeability, high solubility

• Example: metoprolol, paracetamolcite-ref-2[2]

• Those compounds are well absorbed and their absorption rate is usually higher than excretion.

• Class II – high permeability, low solubility

• Example: glibenclamide, bicalutamide, ezetimibe, aceclofenac

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