simplifying hiv treatment now and in the future€¦ · 1/14/2019 1 simplifying hiv treatment now...
TRANSCRIPT
![Page 1: Simplifying HIV Treatment Now and in the Future€¦ · 1/14/2019 1 Simplifying HIV Treatment Now and in the Future David M. Hachey, Pharm.D., AAHIVP Professor Idaho State University](https://reader033.vdocuments.mx/reader033/viewer/2022050105/5f43cc39a54a361c904b697b/html5/thumbnails/1.jpg)
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Simplifying HIV Treatment
Now and in the Future
David M. Hachey, Pharm.D., AAHIVP
Professor
Idaho State University
Department of Family Medicine
Disclosure
• Nothing
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Objectives
• List current first line agents for the treatment of
HIV
• Describe two ways HIV regimens may be
simplified
• Identify the role of newly approved agents
• Educate patients about future approaches to the
treatment of HIV
• Discuss primary care prevention strategies to
reduce morbidity and mortality
GETTING TO 2019
WHAT DO WE KNOW
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CASE
• ”Jane” is 32 year old African American female
living with HIV for 10 years. Her CD4 count is
550 cells/mm and her viral load is undetectable.
She currently takes the following
– Kaletra (lopinavir/ritonavir) 2 tablets BID
– Combivir (zidovudine/lamivudine) 1 tablet BID
• Is ”Jane”:
– Meeting goals of therapy?
– Receiving the standard of care?
Transmission Risk Factors
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Ethnicity Distribution
Why…
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HIV Care Cascade
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Goals of Therapy
Goals of therapy
• Reduce HIV-associated
morbidity and prolong the
duration and quality of
survival
• Restore and preserve
immunologic function
• Maximally and durably
suppress plasma HIV
viral load
• Prevent HIV transmission
Evidence and support
• Reduces HIV-related
morbidity and mortality
• Decreased perinatal
transmission
• Reduced CVD and other
EOD
• Delays drug-resistance
mutations
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Drug Approval Timeline
Zidovudine
Didanosine
Zacitabine
Stavudine
Lamivudine Saquinavir
Indinavir Nevirapine Ritonavir
Combivir Delaviridine
Nelfinavir
Abacavir Efavirenz
Kaletra
Trizivir
Tenofovir DF
Atazanavir Emtricitabine
Enfurvitide
Fosamprenavir
Epzicom
Truvada
Tipranavir
Raltegravir
Atripla
Darunavir
Maraviroc
Etravirine
Complera Rilpivirine
Stribild
Dolutegravir
Triumeq
Genvoya Prezcobix
Descovy
Odefsey
Juluca
Biktarvy Cimduo
Delstrigo Doravirine
Ibalizumab Symtuza
1981 1990 1995 2000 2005 2010 2015
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Standard Approach to Therapy
• Choose one Anchor Drug from one of
the following classes
– Integrase inhibitors
– Protease inhibitors
– Non-nucleoside reverse transcriptase
inhibitors
• Choose a Backbone consisting of
– Two nucleoside reverse transcriptase
inhibitors
Recommended Initial Regimens
for Most PLWH Class Therapy Pill Burden
INSTI-Based
Raltegravir + Tenofovir-Emtricitabine AM PM
Dolutegravir-Abacavir-Lamivudine
Dolutegravir + Tenofovir-Emtricitabine
Bictegravir-Tenofovir AF-Emtricitabine
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SIMPLIFICATION
WHY AND HOW
CASE
• ”Jane” inquires when picking up her medications
that she has heard there are newer agents for
treatment of HIV. She states this is her only
regimen she has taken, has always been
adherent, and has no resistance. Her copay is
$25 per medication and she states that is a
barrier for her.
– Describe to ”Jane” two benefits of simplifying her
regimen
– Recommend one single-tablet regimen ”Jane” could
use to simplify
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Rationale for Simplifying
• Managing or
preventing side
effects
– Limit exposure
• Reducing pill burden
• Avoiding food
restrictions
• Reducing/eliminating
drug interactions
• Eliminating drug-
disease risks
• Lower costs /
insurance
requirements
• Updating to a
‘preferred regimen’
• Higher barrier to
resistance
Potency and Genetic Barrier to
Resistance
Modified from: Tang MW, Shafer RW. Drugs. 2012:72:e1-e25.
Potency
Bar
rie
r to
Re
sist
ance
c-r/DRV
DTG
r/LPV
MVC
c-r/ATV
RAL
EFV
ENF
ETR
ABC ddI
ZDV D4T
3TC FTC
TDF TAF
BIC
NVP
RPV
EVG
Backbone Anchor
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Single Tablet Regimens
• There are currently nine single tablet
regimens that contain an anchor drug and
two backbone agents
– 4 contain an anchor drug with high barrier to
resistance and high potency
– Reduces copay and allows for complete
regimen administration
Two-Drug Regimens
• There have been 8 clinical trials examining
two-drug simplification
– Candidates for these studies generally have
high adherence rates and no drug resistance
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Two-Drug Simplification
Dolutegravir-Rilpivirine
• Juluca® (FDA approved)
• Patients need to be
suppressed for 6 months
on 3-drug regimen before
switch
• No resistance
• Adhere to food
requirements
Dolutegravir-Lamivudine
70
85 89
90
93
91 93
[CELLREF]
72
87 89
88
93
90 91
-20
0
20
40
60
80
100
-4 0 4 8 12 16 20 24 28 32 36 40 44 48 H
IV-1
RN
A <
50
c/m
L, %
b
Study visit
DTG + 3TC (N=716)
DTG + TDF/FTC (N=717)
Virologic outcome
Not FDA Approved
CASE
Benefits for “Jane
• Reduce side effects
• Reduce pill burden
• Single copay
• Higher barrier to
resistance and more
potent agents
• Avoiding food restrictions
Options for ”Jane”
• 3-drug regimens
– Biktarvy (STR)
• Bictegravir/TAF/FTC
– Triumeq (STR)
• Dolutegravir/3TC/ABC
• 2-drug regimens
– Juluca (STR)
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IS NEWER BETTER?
New Agents Since 2015
• Tenofovir Alafenamide (NRTI)
• Bictegravir (Integrase Inhibitor)
• Doravirine (NNRTI)
• Ibalizumab (Entry Inhibitor)
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Tenofovir
Tenofovir Diproxil Fumarate (TDF)
• Approved early 2000’s
• Component of several
fixed dosed tablets
– 300 mg
• Long-term toxicities
– Osteoporosis
– Renal problems
• Larger tablets
Tenofovir Alafenamide (TAF)
• Made available 2015
• Component of several
fixed dose tablets
– 25 mg and 10 mg
• Long-term toxicities
– No bone/renal
– Less favorable lipid profile
Tenofovir
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Bictegravir
• Integrase inhibitor available as a fixed
dose tablet with NRTI backbone
– Biktarvy®
• Potent and high barrier to resistance
• Favorable drug interaction and side effect
profile
– Headache and insomnia most common, but
rare
Doravirine
• Non-nucleoside
reverse transcriptase
inhibitor available
alone or in
combination with
NRTI backbone
– Pifeltro® - single agent
– Delstrigo® –
combination product
• When compared with
other drugs in it’s
class:
– No interactions with
proton pump inhibitors
– No food restrictions
– Well tolerated
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Ibalizumab
• Unique monoclonal antibody that prevents
entry into the CD4 cells
• Given via IV infusion every two weeks
– Needs to be combined with other agents
• High cost
• Reserved for rare circumstances
Is Newer Better
• Tenofovir Alafenamide – Maybe
– Conflicting data, but many providers favor TAF over
TDF
• Bictegravir – YES
– Risen to the top for most providers as the go to drug
• Doravirine – No
– May be used in certain circumstances, but not
necessarily better than other NNRTIs
• Ibalizumab – Maybe
– Novel drug, but specific uses
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WHAT’S NEXT
Long-Acting Injectable
• Cabotegravir (INSTI)
+ Rilpivirine (NNRTI)
– Integrase inhibitor with
a high barrier to
resistance and
extremely long half life
– Both agents are able
to be formulated into a
long acting injectable
suspension
96 Week Virologic Outcomes
94
4 2
87
0
13
84
2
14
0
20
40
60
80
100
Virologic success
Virologic nonresponse
No virologic data
HIV
-1 R
NA
<50 c
/mL,
%
CAB + RPV LA Q8W (n=115)
CAB + RPV LA Q4W (n=115)
CAB + NRTIs PO (n=56)
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Long-Acting Injectable
What We Know
• Oral lead in
• Injections are high
volume given in the
gluteal muscle
• Need a provider (or
pharmacist?) trained to
administer agent
What We Don’t Know
• Who are going to be the
best candidates
• How will this work in rural
settings
• What happens when
someone becomes non-
adherent
– Resistance risk
• Cost
HIV-1 discovered
ZDV monotherapy ZDV/3TC
Triple Drug Therapy
Single Tablet Regimens
The Integrase Era
Long Acting Injectable?
2-drug regimens
Implantable ART
bNAbs for therapy
1983 1987 1995 1996 2006 2012-13 2019 2025
Future of Antiretroviral Therapy
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PRIMARY CARE STRATEGIES
Improving Quality and Duration of Life
Primary Care Management
• Cardiovascular Risk
– Hypertension
– Myocardial infarction
– Hyperlipidemia
• Diabetes
• Chronic kidney
disease
• Osteoporosis
• Smoking
– Lung disease
• Cancer screening
– Colon
– Prostate
– Breast
– Lung
– Cervical
– Anal
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HIV Care Cascade
Rapid testing for HIV at the pharmacy
Connecting new patients
to a provider
Late to therapy
calls and 90 day
fills
HIV Prevention
(PrEP)
Pre-Exposure Prophylaxis
(PrEP)
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Summary
• List current first line agents for the treatment of
HIV
• Describe two ways HIV regimens may be
simplified
• Identify the role of newly approved agents
• Examine patients about future approaches to the
treatment of HIV
• Discuss primary care prevention strategies to
reduce morbidity and mortality