Pharmacokinetics and Drug Interactions in the new HCV Clinical Management SOC
Why worry about Pharmacokinetics (PK) and Drug – Drug Interactions (DDIs) in managing HCV patients?
Interaction due to Enzyme Inhibition: Increased systemic exposure
Interaction due to Enzyme Induction: Decreased systemic exposure
The importance of Cytochrome P450 (CYP) enzymes
Drugs can be metabolised in the Gastrointestinal tract and Liver
Drugs can be transported in the Gastrointestinal tract and Liver
Understanding the disposition of the DAAs
Telaprevir DDIs
Telaprevir increases exposure to CYP3A substrates: Perpetrator
Telaprevir increases exposure to CYP3A substrates
Telaprevir decreases exposure to other CYP substrates
Telaprevir decreases total but not unbound methadone concentrations.
Enzyme inducing agents reduce telaprevir exposure: Victim
Interactions with Boosted PIs
Telaprevir: DDIs with HIV antiretrovirals
Key CROI abstract
Boceprevir DDIs
Boceprevir increases exposure to CYP3A substrates
Boceprevir decreases exposure to other CYP substrates
Boceprevir exposure is decreased by efavirenz
Interaction of Boceprevir and Boosted HIV PIs
Boceprevir does not alter the PK of Raltegravir
Key CROI abstract
DAA Clinical Pharmacology
Contraindications with telaprevir and boceprevir
Drug Survey: Outline
Management of Drug-Drug Interactions
Disposition of Antidepressants
DAAs and Lipid Lowering Agents
Implications for clinical practice
TMC435 (Simeprivir)
TMC435 (Simeprivir) Interactions
BMS-790052
DAA clinical pharmacology: conclusions
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