Newer ARTs CYP involved in metabolism of newer ARTs Effect of drugs of abuse on CYP expression Drug-drug interactions
CCR5 antagonists     Induction of CYP3A4
- alcohol, cocaine, tobacco smoking  

Inhibition of CYP3A4

-Cannabinoids (marijuana), β-carbolines, alcohol
-Decreased bioavailability of ART
- Toxicity from metabolites
Maraviroc 3A4
Cenicriviroc 3A4, 2C8 (minor)
Integrase Inhibitors   - Increased bioavailability of ART
- Toxicity from overdosing
Elvitegravir 3A4
Dolutegravir 3A4 (minor)
Table 1: Newer ARTs, drugs of abuse, and cytochrome P450-induced potential drug-drug interactions in HIV-infected patients
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