HIV Flashcards
At what CD4+ T cell count level makes someone more susceptible to opportunistic infections
< 200
Normal CD4+ count
800-1200
What is the recommended treatment for HIV
INSTI with 2 NRTIs
what test needs done prior to using Abacavir
HLA-B*5701
- If positive do not use Abacavir (Ziagen)
Caution for Tenofovir Disoproxil Fumarate
- Renal insufficiency
- Deceased bone density
CI for Triumeq
do not start if CrCL < 50
do not use if HLA-B*5701 positive
CI for Biktarvy
do not start if CrCl < 30
What does INSTI stand for
Integrase strand transfer inhibitors
NRTIs MOA
Competitively bind to the enzyme reverse transcriptase, blocking HIV viral RNA-dependent DNA polymerase.
This results in DNA chain termination and stops further viral DNA synthesis
Warning for all NRTIs (2)
and which 3 are affected most
Lactic acidosis
Hepatomegaly with steatosis
Zidovudine
Stavudine
Didanosine
Tenofovir toxicities (3)
Nephrotoxicity
Osteoporosis
Fanconi syndrome
List NRTIs (5)
- Abacavir (Ziagen)
- Lamivudine (Epivir)
- Emtricitabine
- Tenofovir DF (Viread)
- Tenofovir AF
- Zidovudin (Retrovir)
NNRTIs MOA
Non-competitive binding to reverse transcriptase and blocking the RNA-dependent and DNA-dependent DNA polymerase activities including HIV replication
List NNRTIs
- Efavirenz (Sustiva)
- Rilpivirine
Protease inhibitors MOA
Inhibiting HIV protease and rendering the enzyme incapable of cleaving the Gag-Pol polyprotein, resulting in non-functional viral proteins and preventing the assembly and maturation of HIV virions
generic names of PIs end in
-navir
List PIs (2)
- Atazanavir (Reyataz)
- Darunavir (Prezista)
What is a PI commonly taken with?
PK booster
ritonavir or cobicistat to increase the levels of the PI
Main drug interactions for PIs
All Pis are CYP3A4 substrates and most are strong inhibitors of CYP3A4
Pharmacokinetic boosters agents
- Ritonavir (Norvir)
- Cobicistat
Integrase strand transer inhibitors MOA
Block the integrase enzyme needed for viral DNA to integrate with the host cell DNA/human genome
Generic name for INSTIs end with?
-tegravir
List INSTIs (4)
Bictegravir
Dolutegravir (Tivicay)
Elvitegravir
Raltegravir (Isentress)
Common ADE for INSTIs
Increased CPK
CCR5 antagonist MOA
Inhibit binding to the CCR5 co-receptor on the CD4+ cells and prevents HIV from entering the cell
List CCR5 antagonist
Maraviroc
Note: Patient must undergo a Tropism Test prior to start of this med
Fusion inhibitors MOA
Block the fusion of the HIV virus with the CD4+ cells by blocking the conformational change in gp41 required for membrane fusion and entry into CD4+ cells
List fusion inhibitors
Enfuvirtide
Common complication of ART (4)
- Lipodystrophy: changes in fat distribution
- Immune reconstitution inflammatory syndrome (IRIS); worsening of preexisting OI or malignancy when ART is initiated
- Lactic acidosis
- Severe hepatomegaly with steatosis
Indication for Megestrol in HIV
Anorexia or Cachexia (wasting of the body and weakness) associated with AIDS
It increases appetite
Indication for Dronabinol in HIV
AIDS-related anorexia
Pre-exposure prophylaxis
Emtricitabine/Tenofovir
Ziagen
generic and class
Abacavir
NRTI
Epivir
generic and class
Lamivudine
NRTI
Viread generic
Tenofovir Disoproxil Fumarate
Retrovir
generic and class
Zidovudine
NRTI
Sustiva
generic and class
Efavirenz
NNRTI
Prezista
generic and class
Darunavir
PI
Reyataz
generic and class
Atazanavir
PI
Tivicay
generic and class
Dolutegravir
INSTI
Isentress
generic and class
Raltegravir
INSTI
Which agents need to be taken with food?
- Protease Inhibitors
- Genvoya
- Symtuza
- Stribild
- Rilpivirine in combo meds such as Complera, Juluca, Odefsey
- Cobicistat
Which agents DoNot need to be taken with food?
- Atripla
- Efavirenza (Sustiva) and combo meds such as Symfi
- Didanosine
- Indibavir (unboosted)
What is the non-occupational post-expoure prophylaxis treatment regimen?
Truvada \+ Raltegravir (Isentress) \+ Dolutegravire (Tivicay)
Within 72 hours for 28 days supply
What treatments are available for PrEP therapy?
- Truvada
- Descovy
Patient must be seen and tested every 3 months
What is the occupational post-expoure prophylaxis treatment regimen?
Truvada \+ Raltegravir (Isentress) \+ Dolutegravire (Tivicay)
Within 72 hours for 28 weeks
CI for Genvoya
do not start if CrCl < 30
CI for Stribild
do not start if CrCl < 70
Which combo meds have PI and Booster in them?
What are some clinical pearls to recognize?
- Stribild
- Genvoya
- Symtuza
PI are CYP3A4 inhibitors
PI can cause rash (SJS/TEN)
All INSTI agents and combo-medication with INSTI must….
Separate dose from polyvalent cation
Complete Regimens (1 tab QD)
NNRTI-based agents
- Atripla
- Complera
- Odefsey
Complete Regimens (1 tab QD)
INSTI-based agents
- Stribild
- Genvoya
- Biktarvy
- Triumeq