Academy Exchange

 View Only
Expand all | Collapse all

Changing ART without genotype available in setting of cardiac and renal comorbidities

  • 1.  Changing ART without genotype available in setting of cardiac and renal comorbidities

    Posted 04-23-2025 09:48

    Good morning,

    I'm hoping for guidance on changing ART for a 79 y/o M with long history of HIV, but new to our practice. Briefly, he is virally suppressed on FTC/TAF + ATV 400mg daily. He's been on the current regimen since 2018, and notes from previous provider state that only known prior regimen was FTC/TDF + ATV 400mg daily. Patient is unaware of any prior resistance or virologic failure, but no genotype is available. He was diagnosed in the mid-90s. PMH is significant for stage 3b CKD, CAD, HTN, COPD, dyslipidemia. 

    Given his renal function, I'm looking to modify his regimen to one that is tenofovir-free. I've been told that some providers are using DTG/3TC at GFRs below what's listed in the package insert. I'm also considering DTG/RPV vs renally dosed components of ABC/DTG/3TC. I'm trying to weigh the risks of a two-drug regimen - without genotype results - against the potential cardiac risks of ABC. Any guidance is appreciated. 
    Thank you,
    Emily Delmotte, NP, MSPH


    ------------------------------
    Emily Delmotte
    Berrien Springs MI
    ------------------------------


  • 2.  RE: Changing ART without genotype available in setting of cardiac and renal comorbidities

    Posted 04-23-2025 15:15
    Reasonable to use DTG/3TC unless CrCl drops to <30 and in that case can prescribe DTG + 3TC (dose reduced 150mg) separately. 


    Josh

    Joshua Khalili MD, AAHIVS

    Pronouns (he/him)

    Extensivist Santa Monica Medical Director

    Program Director, Extensivist Kennamer Fellowship

    Director of Physician Wellness, Department of Medicine

    Assistant Clinical Professor of Medicine 




    UCLA HEALTH SCIENCES IMPORTANT WARNING: This email (and any attachments) is only intended for the use of the person or entity to which it is addressed, and may contain information that is privileged and confidential. You, the recipient, are obligated to maintain it in a safe, secure and confidential manner. Unauthorized redisclosure or failure to maintain confidentiality may subject you to federal and state penalties. If you are not the intended recipient, please immediately notify us by return email, and delete this message from your computer.





  • 3.  RE: Changing ART without genotype available in setting of cardiac and renal comorbidities

    Posted 04-25-2025 08:24

    Do a search to all his labs to see if genotype done at any time, and this maybe time consuming and it may yield

    significant results, and as to change, there are other options, and as usual if it ain't broke, don't fix it



    ------------------------------
    Patrick Aufiero
    Long Beach Township NJ
    ------------------------------



  • 4.  RE: Changing ART without genotype available in setting of cardiac and renal comorbidities

    Posted 04-25-2025 08:33

    I'm not a big fan of the "if it ain't broke, don't fix it" philosophy. I update my iPhone periodically not because the old one doesn't work, but because the new one is better.  We should take the same approach with medical treatment.  But in this case, I would say the regimen is definitely "broke."  The measure of success is not just viral suppression.  This is a person with CKD state 3b who is on a nephrotoxic drug(ATV) that may have contributed to progression of his kidney disease. He's also on a combination (unboosted ATV with tenofovir) that is not recommended because of drug interactions.  In my view, this regimen must be changed.



    ------------------------------
    Joel Gallant, MD, MPH
    Johns Hopkins University
    Baltimore, MD

    AXCES Research Group
    Santa Fe, NM
    ------------------------------



  • 5.  RE: Changing ART without genotype available in setting of cardiac and renal comorbidities

    Posted 04-25-2025 09:47
    Edited by Emily Delmotte 04-25-2025 10:02

    Thank you all for the guidance and resources.

    My understanding of proviral DNA in the setting of viral suppression is that it may provide some insights but should be interpreted with caution given that it might not capture all resistance associated mutations. Is that accurate?


    ------------------------------
    Emily Delmotte
    Berrien Springs MI
    ------------------------------



  • 6.  RE: Changing ART without genotype available in setting of cardiac and renal comorbidities

    Posted 04-25-2025 17:26

    Hi Emily,

    yes, the proviral DNA may provide additional insights that you didn't already know about. The absence of any mutation found on a proviral DNA test (or a regular genotype for that matter) does not exclude that mutation from the patient's virus. Once a mutation is noted, it is always present, just may not be expressed (depends on what ART the patient is taking at that time, or in the case of the proviral, whether or not the sample drawn had that mutation in the DNA). We want to keep a running list of any mutations found over time, as they are cumulative, and of course interpret with ART history and adherence information. 

    This HIV ECHO brief didactic may help clarify if this post is confusing :) 



    ------------------------------
    Carly Floyd (she/ella), PharmD, PhC, AAHIVP
    Albuquerque, NM
    CaCloud@salud.unm.edu
    ------------------------------



  • 7.  RE: Changing ART without genotype available in setting of cardiac and renal comorbidities

    Posted 04-26-2025 09:09

    Yes, that's accurate. Mutations that are detected are important, but there are definitely sensitivity problems.



    ------------------------------
    Joel Gallant, MD, MPH
    Johns Hopkins University
    Baltimore, MD

    AXCES Research Group
    Santa Fe, NM
    ------------------------------



  • 8.  RE: Changing ART without genotype available in setting of cardiac and renal comorbidities

    Posted 04-23-2025 15:20

    Emily,

    Frankly, I'd be more concerned about the nephrotoxicity of atazanavir and the potential drug interactions between unboosted atazanavir and tenofovir than I would be about kidney toxicity with TAF.  (TAF is indicated for eGFRs down to 30 because it hasn't been studied in the 15-30 range, but not because it's thought to be nephrotoxic.)  Therefore, one option would be to switch to a more standard and contemporary 3-drug INSTI-based regimen like BIC/FTC/TAF or DTG + FTC/TAF, because you wouldn't have to worry about whether he has undocumented resistance.  In fact, you'd be increasing the resistance barrier of his regimen with that kind of a switch.

    However, if you still want to avoid TAF, the two-drug regimens you mentioned (DTG/3TC or DTG/RPV) would be reasonable, as it doesn't sound like he has drug resistance.  (A negative proviral DNA genotype could also be somewhat reassuring if you're considering a 2-drug regimen). If you go with DTG/RPV, remember it has to be taken with a meal, and she shouldn't be on H2 blockers or PPIs.

    I definitely would not use ABC. In multiple studies it has been shown to increase the risk of MI, probably by causing hypercoagulability.  If there are any ABC candidates left in the world, this man is NOT one of them!

    Good luck!



    ------------------------------
    Joel Gallant, MD, MPH
    Johns Hopkins University
    Baltimore, MD

    AXCES Research Group
    Santa Fe, NM
    ------------------------------



  • 9.  RE: Changing ART without genotype available in setting of cardiac and renal comorbidities

    Posted 04-24-2025 16:57

    Can you not get a genotype Archive?  if you cannot, would favor switching to an INSTI regimen as per Dr. Gallant.

    For a patient that has been on treatment since the 90s, would be concerned that he may have seen an NNRTI or a regimen with 3TC in the past that would make the use of DTG/3TC or DTG/RPV risky now



    ------------------------------
    AlvaroLopezMDAustellGA
    ------------------------------



  • 10.  RE: Changing ART without genotype available in setting of cardiac and renal comorbidities

    Posted 04-25-2025 16:27

    I think we have pretty good data that suggests an M184V mutation that developed many years ago would likely have no clinical effect on a suppressed switch patient.  Therefore, I would not be too worried about using DTG/3TC in this patient.  



    ------------------------------
    Adam Zweig
    San Diego CA
    ------------------------------



  • 11.  RE: Changing ART without genotype available in setting of cardiac and renal comorbidities

    Posted 04-26-2025 09:23

    I'm not sure we have enough data to make this switch.  It's true that there are studies showing good results with DTG/3TC if the M184V is "old" (selected many years ago).  But what's the threshold?  3 years?  5 years? 7?  I think we need larger, better studies before I'd be willing to completely ignore a mutation I knew was there, especially when there's rarely a compelling reason to do so.



    ------------------------------
    Joel Gallant, MD, MPH
    Johns Hopkins University
    Baltimore, MD

    AXCES Research Group
    Santa Fe, NM
    ------------------------------



  • 12.  RE: Changing ART without genotype available in setting of cardiac and renal comorbidities

    Posted 04-28-2025 16:56

    Sure.   But if his GFR is in fact declining, and he has advanced CKD, many of us may worry about keeping tenofovir on board. For me, that may be just compelling enough to go with DTG/3TC.



    ------------------------------
    Adam Zweig
    San Diego CA
    ------------------------------



  • 13.  RE: Changing ART without genotype available in setting of cardiac and renal comorbidities

    Posted 04-25-2025 16:36
    Although I certainly agree with Joel, having been in the HIV/AIDS clinical world since 1989, I think we must always approach switches with patients cautiously and respectively - and certainly do so if indeed there are adverse renal, hepatic or perhaps metabolic effects.  Drug-drug interactions were also a frequent concern with boosted PIs -  but less so these days. 
     
    We switched LOTS of patients in the past - mainly for simplification purposes or drug side-effect. But once we were at QD dosing -  it often comes down to shared decision making with our patients.  This is especially important with a new patient who you have not established a relationship with (e.g. - trust).  As a quick example, we recently had a  new patient come in to us on ATRIPLA (you may need to look this one up). She is clinically very stable, undetectable, and has a normal CD4 count/ %. We discussed switching in the future, and likely will do so -  but did not do this at her first visit. 





  • 14.  RE: Changing ART without genotype available in setting of cardiac and renal comorbidities

    Posted 04-26-2025 08:40

    Agree discussion of all hiv meds once daily or injections 

    and not to switch unless issue as described in case

    What to do if all labs normal, no body changes, or any other issues with the "Atripla" and stable patient, who has been on for

    years, and do you still change the hiv drug in this stable, long term patient?

    Just asking

    thanks



    ------------------------------
    Patrick Aufiero
    Long Beach Township NJ
    ------------------------------



  • 15.  RE: Changing ART without genotype available in setting of cardiac and renal comorbidities

    Posted 04-26-2025 09:30

    Patrick,

    I switched a lot of people from Atripla to more contemporary regimens based on CNS effects, low resistance barrier, and TDF toxicity issues. What surprised me was that many of them, who denied having any CNS side effects on efavirenz, reported feeling better after the switch. They often described feeling more awake and alert in the morning, or even having improved mood.  On patient said, "It was like someone opened the curtains, and I never knew they were closed."  Also, as people get older, the bone and kidney toxicity of TDF become more important.  So while I wouldn;'t force a switch, I'd bring it up at every visit.



    ------------------------------
    Joel Gallant, MD, MPH
    Johns Hopkins University
    Baltimore, MD

    AXCES Research Group
    Santa Fe, NM
    ------------------------------



  • 16.  RE: Changing ART without genotype available in setting of cardiac and renal comorbidities

    Posted 04-27-2025 07:45
    we discussed newer / safer (? better) single tablet options and likely will do this in the future. another issuer for some of these older meds is pharmacy availability so in some cases this may impact switching to a new ART regimen. 





  • 17.  RE: Changing ART without genotype available in setting of cardiac and renal comorbidities

    Posted 04-26-2025 09:18

    I agree that in the case of Atripla, I would recommend a switch, but wouldn't push too hard at first, especially if I hadn't developed a relationship yet.  However, this is a different situation.  This patient has kidney disease on atazanavir, a nephrotoxic agent. In fact, the atazanavir could even be the cause of his kidney disease. As health care providers, we are supposed to "do no harm." When there are so many better options, I would not only recommend a switch, but I would refuse to continue prescribing a drug that could be hurting the patient.



    ------------------------------
    Joel Gallant, MD, MPH
    Johns Hopkins University
    Baltimore, MD

    AXCES Research Group
    Santa Fe, NM
    ------------------------------