• t-writescode 2 days ago |
    This is incredibly exciting! The main method available for PrEP, in the United States, at least, is a daily pill. I think (I don't know) there is a monthly shot, too.

    Daily pills take a lot of time investment; monthly shots are better; but once every 6 months is awesome! Especially in circumstances where it might be difficult to guarantee a daily pill or even a monthly shot.

    • heavyset_go 2 days ago |
      There's a shot that lasts a couple months mentioned in the article.
    • bobthepanda 2 days ago |
      There is a generic daily pill (Truvada), a more expensive one (Descovy) and an every two months shot (Apretude.)

      Apretude has lower efficacy than Descovy or Truvada, but once you factor in human error in taking a daily pill regimen, it is more even. Human error is a significant factor since the current treatment protocols say if you’re not sure whether or not to take it, it is safer to skip than to accidentally double the dose.

      • m3kw9 a day ago |
        Seen these on commercial, I wish they stop with commercial for meds. Depressing asf, keep reminding me of my mortality while I’m trying to relax and enjoy a moment
        • UltraSane a day ago |
          Do you mean you don't want to be reminded of the risk of STDs when about to engage is sex?
          • m3kw9 a day ago |
            I was talking about med ads in general, and yes I don’t need to be reminded humans can get stds from unprotected sex, nor I think that is a place for it
        • IshKebab a day ago |
          Definitely one of the weird things I noticed in America. Most countries do not have medical adverts, for obvious reasons.
          • jcul 16 hours ago |
            Yeah was going to comment the same. Always really strange to see so many adverts for medication when I visit the US.
      • cosmotic a day ago |
        The data I've seen shows apretude is more effective, not less
    • thaumasiotes 2 days ago |
      > Daily pills take a lot of time investment; monthly shots are better

      That is a matter of opinion. How much time do you think it takes to swallow a pill?

      • t-writescode 2 days ago |
        You need to be in the same place, at the same time, every day, and always have them with you, continually. You also need to keep them dry and at room temperature all the time, so no leaving them in your car.

        Here's another example of a pill that needs to be taken every day, at approximately the same time of day: https://www.plannedparenthood.org/learn/birth-control/birth-...

        From this article on that pill,

        > But people aren’t perfect and it’s easy to forget or miss pills — so in reality the pill is about 93% effective. That means about 7 out of 100 pill users get pregnant each year.

        You mess up and you have HIV for life. It's better to have something that provides more stable protection :)

        • 2Gkashmiri 2 days ago |
          https://en.m.wikipedia.org/wiki/Directly_observed_treatment,...

          This is already possible by DOTS.

          In India it did wonders

          • rcxdude 2 days ago |
            It's also quite expensive
          • slashnode 2 days ago |
            DOTS is effective for TB because it’s a time-limited treatment (usually 4 months for drug susceptible strains of TB) and is only relevant for treating infected individuals

            DOTS wouldn’t be feasible for a prophylactic treatment like this as the number of participants would be huge and the treatment period is indefinite (ie: the patient’s lifespan)

          • saagarjha 2 days ago |
            > Directly observed treatment

            For a sexually transmitted disease? Harder than you'd expect, considering people are reticent about their private lives.

            > short-course

            This needs to be continued forever, as far as I understand.

      • mort96 2 days ago |
        I know from experience that I'm not able to take a vitamin D pill every day in the winter months to combat winter depression. It's actually kinda difficult to build habits like that, and I'd have to remember to bring it with me wherever I may go and stay for a couple of days.
        • bbarnett 2 days ago |
          Interesting. Such variance in humans.

          I find such things inordinately simple. I wake, stretch, urinate, go take my vitamins and drink two glasses of water. A third follows me to my current home office, where I process emails, alerts, whatever may be.

          I find the best time to triage overnight emails is when I'm not quite awake yet to realise I'm doing it. Less pain that way.

          The key is it being part of a routine, and the easiest is a part of the wake routine. At least for me. Which is why I find human variance interesting.

          Meanwhile scheduling something 6+ months out (a doctor's appointment, or maybe at a pharmacy) for a shot is quite difficult to keep on time. I have to schedule, I have to keep free, I have to keep it in my mental space (calendars on phones help, but still...).

          I literally don't know what part of the planet I will be on in a week. How on Earth could I know where to schedule such a thing, months or even weeks in advance?

          Yet I bet for the parent poster, scheduling things like this is a breeze. Wild. Totally incomprehensible for me, as maybe it being easy for me to daily schedule is for them?

          • n4r9 2 days ago |
            How do you ensure that you always have a sufficient stock of vitamins either you, despite being in a different part of the world on a weekly basis?

            Do you have kids, if so how do you deal with frequent disruptions to the morning routine? Do you not have days where you just need to get up and go e.g. to catch a flight, get to a meeting, take a kid to school, or because you stayed up late and got drunk, etc... and taking vitamins took a back seat?

            • thaumasiotes 2 days ago |
              > Do you have kids, if so how do you deal with frequent disruptions to the morning routine? Do you not have days where you just need to get up and go e.g. to catch a flight, get to a meeting, take a kid to school, or because you stayed up late and got drunk, etc... and taking vitamins took a back seat?

              This is crazy. You deal with the morning routine by taking your pills when the alarm goes off, because there's nothing the kids can be doing that won't wait for that.

              Flying, driving, and driving are exactly the same. Take your pill when the alarm goes off.

              If you drank so much that it rendered you unconscious through the time you needed to take your pill, the solution is "don't do that". That's not exactly an unavoidable necessity of life.

              • viraptor 2 days ago |
                > because there's nothing the kids can be doing that won't wait for that.

                I feel you don't have young kids then. Jumping on you, bleeding, having a nightmare, making possibly-chocking-sounds, running away with your pills, vomiting on the floor, etc. will definitely take priority over whatever you thought you were going to do after waking up. And that doesn't even touch on people with executive functions issues. Or the 1-2yo period where the time you officially wake up may be often a very fuzzy concept. (You mean the 5am wake-up, the 5.45 one, or the getting up after not falling asleep)

                • bbarnett a day ago |
                  Do you miss urinating? Drinking water instead of dying?

                  It's literally all the same thing. I wake up. I do wake up stuff. If there's some disturbance, some emergency, I still have to go to the bathroom, drink, and yes take vitamins eventually.

                  It's insanely simple beyond all belief. You just need to form a habit, that's all. "Take vitamins when first drinking water in the morning", or coffee, or whatever. Done. Done forever.

                  I get that my above statements baffle some people. As I said before, I don't get why.

                  • t-writescode a day ago |
                    Habits do not have the internal, loud blaring horns of physical reminders for most people / anyone.

                    You gotta pee? You __know__ you have to pee, unless you automatically relieve yourself, and if that's the case, that's quite abnormal.

                    I feel like this is one of those situations where you need to realize that some people - and on this issue, the research says *most people* are not like you. They are different. It really, truly can be as simple as that. Recognizing that people are different and have different needs and struggles is difficult for a lot of people, but still very important.

                    Think of it like ADHD. The solution for a person with ADHD is not "just use more alarms" or "just get good".

                  • viraptor 15 hours ago |
                    Are you asking me specifically? Then yeah, I have executive functions issues, like a not insignificant number of tech people here. So the idea of "just form a habit" just doesn't apply the same way in that group.

                    If you're asking in general, then the statistics show this is a problem in general population. Regardless of the specific reasons for it, people can't take daily pills perfectly on schedule.

                    "Compliance to antihypertensive treatment was found in only 15% of the patients." (https://pubmed.ncbi.nlm.nih.gov/15942423/)

                    "In the treatment of HIV and AIDS, adherence to antiretroviral agents varies between 37% and 83% depending on the drug under study (10, 11) and the demographic characteristics of patient populations" (https://iris.who.int/bitstream/handle/10665/42682/9?sequence...)

                    When you look at this as a population overview and you say you're got a routine and have a 100% compliance rate - you are the anomaly! But that also means your "just do ..." does not generalise for multiple reasons.

              • n4r9 2 days ago |
                > there's nothing the kids can be doing that won't wait for that

                There are plenty of things kids - especially young kids - will do that require you to push tasks back. Like a vomit, poo, or spillage situation needing immediate attention. Or throwing a tantrum if you try to bring them back upstairs where the pills are (thus waking everyone else up). Not to mention that it can be exhausting if they're not sleeping well - which can be half the time - and it's tough to remember every little thing when you're exhausted.

                > If you drank so much that it rendered you unconscious ... that's not exactly an unavoidable necessity of life

                You asked "how much time does it take to swallow a pill". The convenience of that depends on people's lifestyles. Lots of people will wake up at 7am in the week, go out and have a few drinks on Friday/Saturday, and wake up whenever/wherever they wake up the next day. That is not an extreme situation. It's a great freedom to dynamically adapt when you go to bed and when you wake up. Requiring a change to that lifestyle is hardly evidence that something is trivially simple.

                • RHSeeger a day ago |
                  As a diabetic that needs to take their insulin at the same time every day... set an alarm? It is inconvenient, sure? But if you value your health then it's worth it. And if you don't value your health, why do you care if the medicine is less effective?
                  • n4r9 a day ago |
                    Sure, but the question is...

                      What's more convenient and likely to be followed: a 6-monthly jab or a daily pill?
                    
                    not...

                      Is it possible to remember to do something everyday?
            • bbarnett 2 days ago |
              I don't have much issue with buying vitamins, because I take them with me. Just as I take toothpaste, etc. If I am there long enough to need more vitamins, it is in the same category as needing more toothpaste, and you resupply as you would at home.

              No kids. I do have emergency paging and downed server / PROD to deal with 24/7, not the same as kids, but wake-disrupting all the same.

              There is rarely something urgent enough to prevent urinating in the morning, and being thirsty after waking up is typcially a no go either. If prod is down maybe I'll eval first, but humans need out and in of water. I'm not going to urinate on the floor, and I'm not going to sit dehydrated and parched mouth for long either.

              So wake, urinate, drink and vitamins are in that too.

              My vitamins are in the bathroom, and it takes less than 10 seconds to consume them.

              • n4r9 2 days ago |
                > I don't have much issue with buying vitamins, because I take them with me.

                Nevertheless you do have to remember to pack them, and you need to regularly replenish your stocks. I'm guessing that this replenishing happens at least as often as every 6 months, which is how often you need to arrange the injection in question. By the sounds of it you do a lot of travelling, so you may need to anticipate cases where you are away at the time you would normally replenish stocks.

                > you resupply as you would at home

                How does that happen? You notice how many pills are left in the bottle, and make a note to order more when it's getting low? Or immediately make an order there and then?

                I know I'm being really pedantic, but I'm trying to illustrate why many people would perceive daily pill-taking to be strictly more labour-intensive than a 6-monthly injection.

                • bbarnett a day ago |
                  This is such a weird conversation to me. As I said before, I'm not surprised I don't, and you don't grok.

                  What order? Order? I go to the grocery store from time to time. I also go to the pharmacy. When I do, I buy things I require. It's literally that simple. I do the same with any other type of food, or supply I need.

                  Why aren't you asking me if I have trouble buying butter, toothpaste, salt, pepper? I see I'm getting low, and I buy. Done. Super simple.

                  Literally, the entire planet seems to do it mostly this way.

            • kolinko 2 days ago |
              Not vitamins but vrious meds in my case. And a very chaotic lifestyle at times.

              The meds are always next to bed, and a pouch with meds for when I travel, plus a set of them in my backpack in case I sleep out of home.

              When I was in a relationship and we lived separately, I had two sets - one on my place, another in my gf’s place.

              It’s a bit like “how do you manage to brush your teeth daily if you have a chaotic routine”.

              • n4r9 a day ago |
                > It’s a bit like “how do you manage to brush your teeth daily if you have a chaotic routine”.

                That doesn't move me away from my hunch that the jab is more convenient for many. Studies show that around 30% of people faily to brush the recommended twice a day.

                • s1artibartfast a day ago |
                  they weren't trying to move you. They were very explicit about commenting on human differences.
                • RustyEarthfire a day ago |
                  On the other hand, even fewer have their recommended yearly checkup: "For working-age adults ages 19-64, 38.7% had a dental visit [in the past 12 months]." [0]

                  As you say though, the shot may not be everyone's preference, but it will be great for many.

                  [0] https://www.ada.org/resources/research/health-policy-institu...

        • Krssst 2 days ago |
          I think I got monthly vitamin D supplements a while ago. Since the body stores it it was feasible to just take one large dose once a month. (however overdosing is still a possibility ; definitely never take a monthly pill daily).
          • Lanolderen a day ago |
            Thanks. I just realized I can just take small handfuls from time to time. I should have been taking it daily but, likely because I don't care for it, I only remember to do so about twice a month.
      • Pikamander2 2 days ago |
        What's not a matter of opinion is low adherence rates; doctors regularly struggle to get patients take their medication consistently and on time.

        Having a shot like this be widely available will be an important stepping stone for eradicating HIV.

      • fennecbutt 2 days ago |
        As someone who takes prep what a silly question.

        Of course it's easier to get a shot than to take individual pills, I think people would universally agree on that.

        Also with prep, since you have to continue dosing 2 days after last activity you get awkward situations where you left it at home or get distracted by life events.

        I think this is more common because most people do event based dosing rather than continuous (which would form a habit of taking it every day).

        • dbbk 2 days ago |
          I mean broadly yes but not universally. Some people have fears of needles etc.
    • quitit 2 days ago |
      The problem is the cost, in Europe and the USA the treatment is over $40,000 USD per year, which isn't realistic for regular people.
      • cyberlurker 2 days ago |
        Isn’t that the starting price? Insurance and countries can buy in bulk and bring it down. Then overtime doesn’t the price come down due to competition from generics?
        • quitit a day ago |
          The $40k price is the current price in the USA.

          Generics aren't possible in markets where the patent holder enforces their rights. The article is about how Gilead will allow certain poverty ridden countries to access the drug without the need to pay a licensing cost (i.e. they can receive a "generic").

      • droningparrot a day ago |
        Drug plans often bring this down to $0-600/year out of pocket
        • JumpCrisscross a day ago |
          It's frankly nuts that we don't make preventative medicine for transmissable diseases free in the rich world. It's so obviously in the collective interest to reduce prevalence.
          • mschuster91 a day ago |
            The problem is, as usual, payment.

            There have been many failed attempts at developing suppressive, curative and preventative medicine against HIV over the decades, and not all of that was funded by charities or government grants that don't expect repayment - especially not the later stage trials.

            • JumpCrisscross a day ago |
              > problem is, as usual, payment

              If only we had an institution with the aim of pursuing the long-term interests of the collective.

              • thegrimmest a day ago |
                We don’t, or at least not everyone agrees we do. Some of us think that we only have an institution that administers peace and order, and believe that pursuing the good is a private, voluntary concern.
      • 4fterd4rk a day ago |
        Every gay person I know, myself included, is on prep. From the VP at a Fortune 500 on down to a coffeeshop barista. Cost is not an issue, at least not in the United States.
        • UltraSane a day ago |
          How does wide spread PrEP use affect sexual behavior?
          • evoke4908 a day ago |
            Pretty much exactly what you expect given than promiscuity is not taboo in the gay community.

            All in all, HIV just isn't a problem anymore. It's on the same sort of threat scale as any other STD. Even if you're infected, you just continue taking PrEP (technically PEP) for the rest of your life and that's about it. Normal life expectancy and not much other health complications for most people with consistent treatment.

        • quitit a day ago |
          I believe you might be referring to tablet-based PrEP, that treatment is a few hundred dollars a year depending on your geographic region.

          The $40k+ price is the cost of the 2x pa injectable form. This is a relatively newer treatment and not widespread.

    • JeremyNT a day ago |
      Am I wrong in thinking this is a huge development? Maybe one of the most important stories for public health this decade?

      AIDS kills more people than malaria, and preventing malaria has long been viewed as one of the lowest hanging fruits in public health.

      Hoping for eradication is too much with the limited immunity duration, but if we can mass produce a vaccine - even if it has to be administered twice a year - this could save millions of lives over the course of a decade.

  • Aardwolf 2 days ago |
    > and results published Wednesday show it worked nearly as well in men.

    So not as well? Is there a biological reason for this?

    Also, is it typical to do such studies on single genders rather than on a mix of humans?

    • a_t48 2 days ago |
      Receptive PIV sex has 2% transmission rate, PIA is 20%. Cis men don't have a vagina, so...
      • t-writescode 2 days ago |
        There's also a chance that the countries they were able to / encouraged to test in are quite hostile to LGBTQ+ people
        • saagarjha 2 days ago |
          This is mentioned in the article.
      • bobthepanda 2 days ago |
        To further elaborate, the anal mucous membrane is thinner than that of the vagina, so it’s easier for HIV to transmit that way.
      • perching_aix 2 days ago |
        could you undo the abbreviations please?
        • dhaugshs 2 days ago |
          Penis in vagina. It's a specification. It's like "birthing parent", to be clear what hardware is being used.

          Given that HIV infection rates are very variable (over an order of magnitude, sometimes two) by subpopulation, clarifications detailing what hardware is doing what are very necessary.

          • IshKebab a day ago |
            We already have words for that: anal/vaginal sex.
            • a_t48 a day ago |
              Yeah you’re right, I’m not sure why I wrote it that way.
      • ProfessorLayton a day ago |
        Your numbers are way, way off [1].

        Receptive vaginal sex: 0.08% (1 transmission per 1,250 exposures)

        Insertive vaginal sex: 0.04% (1 transmission per 2,500 exposures)

        Receptive anal sex: 1.4% (1 transmission per 71 exposures.)

        Insertive anal sex: 0.11% (1 transmission per 909 exposures)

        [1] https://stanfordhealthcare.org/medical-conditions/sexual-and...

    • Fomite 2 days ago |
      A few reasons:

      - Women and girls make up the majority of HIV cases, especially in the developing world

      - If you're estimating the effect in both men and women, you're reducing your power to detect an effect in either group. If you have a limited budget, it's going to be hard to recruit, etc., you may well be better off powering your study for the group you think is going to be the most impactful, then going back. We saw this with the HPV vaccine - getting it going in the highest impact groups, and then going back later

      - Preventing HIV in women also prevents maternal to child transmission

      - "Men with HIV" are actually two different groups - men who have sex exclusively with women, and men who have sex with men. You then also need to power your study for both sub-groups.

      • mike_hearn 2 days ago |
        That's inaccurate. The vast majority of all cases are in men. For instance in America only 22% of HIV+ people are women. Our World In Data has a map that shows this visually:

        https://ourworldindata.org/hiv-aids

        The only place this isn't true is sub-Saharan Africa. As there's no biological explanation for that discrepancy it's been hypothesized that it's because in Africa a lot of reported HIV cases are fraudulent, due to the large amount of AIDS/women specific foreign aid money and weak auditing standards.

        • foldr 2 days ago |
          It's not inaccurate. More than half of the people currently living with HIV worldwide are women:

          https://www.unaids.org/en/resources/infographics/girls-and-w....

          https://www.hiv.gov/hiv-basics/overview/data-and-trends/glob...

          • mike_hearn 2 days ago |
            The phrasing "majority of all cases, especially in the developing world" implies that it's true everywhere. Even putting that aside, it's only the bizarre situation in Africa makes the statement technically true. If we interpret it in the way it was meant to be interpreted then the statement isn't really true because everywhere that has reliable data shows the opposite: men get it the most.
            • foldr a day ago |
              I don't think the 'especially' has that implication when you consider the context of the article that we're commenting on. It's true that women and girls make up the majority of people living with HIV worldwide, and this is especially true of the developing world. On the other hand, your statement that "the vast majority of all cases are in men" is simply false. Depending on the interpretation of 'vast', it's arguably not even true in much of the West. For example, in the UK, about a third of people living with HIV are women; in the US it's about a quarter.

              There's nothing 'bizarre' about the situation in Africa. People's sexual behaviour is different in different societies, and this can obviously influence how STIs are distributed among different groups in the population.

        • bobthepanda a day ago |
          There is a societal reason; condom use and polygamy. Condom use is less common and polygamy more amongst straight people in sub saharan Africa.

          There was also very prominent AIDS denialism up to the 2000s so there was a bunch of lost time leading to an explosion in infections; the most notable example being South African president Thabo Mbeki.

    • 9x39 2 days ago |
      HIV has heavily…gendered outcomes. Others have mentioned infection rates, there’s also sheer exposure rates to consider.

      https://www.cdc.gov/hiv-data/nhss/estimated-hiv-incidence-an...

    • ChrisRR 2 days ago |
      When you're trying to limit the variables on a study, yes. HIV reception between men and women has many differences so it can be better to limit your study and get twice as much data
    • astura 2 days ago |
      The receptive partner in sexual activity is at much higher risk of infection than the penetrating partner.
      • hackernewds a day ago |
        Soooo we should've seen the opposite outcome given that fact?
  • Animats 2 days ago |
    Here's a talk by someone from Gilead from a few years ago about how it works.[1] Back then they were still testing on animals.

    It's amazing that a small-molecule drug can be that effective for six months. It's not a vaccine. It doesn't stimulate the immune system. Completely different mechanism. It's not a slow-release implanted thing, either.

    [1] https://www.youtube.com/watch?v=Hmjn_7TeFUA

    • allenjhyang a day ago |
      Really cool. Is the mechanism already used for other diseases? Or is this a first-of-its-kind application that'll open the door to using the mechanism for others?
    • lightedman a day ago |
      That is what got me. How in the world does this drug have such a long life in the body? Can it bioaccumulate, and that's why it's only given every 6 months? If it can, are there effects that are not desirable?
  • Wolfenstein98k 2 days ago |
    Amazing, but surely you don't need to keep getting the shot once you've got HIV.
    • from-nibly 2 days ago |
      I'm sorry no one got the joke.
  • andrewstuart 2 days ago |
    This is especially big news for those of us there in the 1980's when there was no treatment or vaccine at all, just a death sentence.
  • skort 2 days ago |
    Great news that it's so effective in women. Less great news is that availability to people who could use it the most is based on the whims of the drug maker.
    • llm_trw 2 days ago |
      It's amazing that we now have subscription medicine.
      • JumpCrisscross a day ago |
        > amazing that we now have subscription medicine

        Now? You don't keep up on your immunisations? Ever seen an old person's medicine cabinet?

    • t-writescode 2 days ago |
      At least for now, PrEP is available on most/all drug plans for free or very, very cheap, in the United States https://www.goodrx.com/truvada. No idea what happens when the ACA is further harmed.

      And per the article,

      > Drugmaker Gilead said it will allow cheap, generic versions to be sold in 120 poor countries with high HIV rates — mostly in Africa, Southeast Asia and the Caribbean.

      So, the places that need it most will be able to get it for cheap. This is about as positive of a result as can be with how the modern world is currently laid out.

      The people that need it the most in the countries that need it the most will likely be able to get it.

      • razakel 2 days ago |
        >So, the places that need it most will be able to get it for cheap.

        It's still about a dollar a day, which is a lot of money for the most needy.

  • dinoqqq 2 days ago |
    Here's a link to the original research: https://www.nejm.org/doi/full/10.1056/NEJMoa2411858
  • raylad 2 days ago |
    This treatment does not in fact prevent HIV infection. It prevents infected cells from producing viable virus particles.

    Because of this, it seems very likely that if any patient being treated with this drug ever discontinued it, they could develop HIV quickly from cells that were already infected in their body that had been suppressed from producing virus particles but were no longer suppressed.

    I was not able to find, in a little searching, any study at all on whether cells infected during treatment survive or are somehow cleared by the immune system or undergo apoptosis. Without this information it seems highly irresponsible to claim that this is a method of preventing HIV infection.

    • mike_hearn 2 days ago |
      The problems are bigger than that. The trials don't attempt to show impact on AIDS itself. Biomarker studies like this have a long history of going wrong due to statistical or theory related problems.
      • John23832 2 days ago |
        That’s because aids, the subsequent syndrome derived from hiv infection, wasn’t the target of the study?
      • roywiggins 2 days ago |
        HIV isn't a biomarker, it's the cause of AIDS. People without detectable HIV don't develop AIDS.

        People with HIV and on ARVs don't develop AIDS either, and any study that watched people contract HIV but didn't provide their participants with ARVs would be both unethical and pointless.

        • mike_hearn 2 days ago |
          By definition anything that isn't the actual disease is a biomarker proxy for it. What actually matters is disease.

          > People without detectable HIV don't develop AIDS.

          An AIDS diagnosis requires the presence of HIV so your statement is a tautology (not your fault). If we rephrase to what you meant, that people without detectable HIV don't develop AIDS or any identical set of symptoms, then actually they do but when it happens it goes by a different name (ICL, idiopathic CD4 T lymphocytopenia).

          ICL is what they call AIDS that appears in HIV negative people and is essentially ignored by the public health community, as it's not supposed to exist.

          • JumpCrisscross a day ago |
            > what they call AIDS that appears in HIV negative people and is essentially ignored by the public health community, as it's not supposed to exist

            And people who test negative for influenza often show flu-like symptoms, must be a conspiracy.

          • roywiggins 11 hours ago |
            why should anyone care whether a drug that targets HIV has any effect on medical conditions that aren't caused by HIV? you wouldn't expect it to!
    • roywiggins 2 days ago |
      PrEP is not new, surely if this was common there would be studies showing everyone going off PrEP suddenly testing positive at enormous rates?
      • raylad a day ago |
        The existing PrEP drugs work differently.

        Cabotegravir is an integrase strand transfer inhibitor. This means it blocks the HIV's enzyme integrase, thereby preventing its genome from being integrated into the human cells' DNA.

        Emtricitabine is an analogue of cytidine. The drug works by inhibiting reverse transcriptase, the enzyme that copies HIV RNA into new viral DNA.

        Both of these drugs actually prevent infection.

    • JumpCrisscross a day ago |
      > This treatment does not in fact prevent HIV infection. It prevents infected cells from producing viable virus particles

      Lenacapavir interferes "with multiple essential steps of the viral lifecycle, including capsid-mediated nuclear uptake of HIV-1 proviral DNA (by blocking nuclear import proteins binding to capsid), virus assembly and release (by interfering with Gag/Gag-Pol functioning, reducing production of capsid protein subunits), and capsid core formation (by disrupting the rate of capsid subunit association, leading to malformed capsids)" [1].

      For comparison, tenofovir diphosphate (from Descovy) "inhibits the activity of HIV reverse transcriptase and causes DNA chain termination after getting incorporated into the viral DNA" [2].

      Descovy thus works at stage 3 (reverse transcription); Lenacapavir works at stages 3 (integration), 6 (assembly) and 7 (budding) [3].

      > it seems very likely that if any patient being treated with this drug ever discontinued it, they could develop HIV quickly from cells that were already infected in their body

      HIV-uninhibted T cells should be fine clearing these out. IT would be more surprising to see the cells stick around after having been infected.

      [1] https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=e56...

      [2] https://www.clinicaltrialsarena.com/projects/descovy-emtrici...

      [3] https://hivinfo.nih.gov/understanding-hiv/fact-sheets/hiv-li...

      • raylad a day ago |
        The references you provided are prescribing information and to other drugs which actually are anti-retroviral.

        You did not provide any reference showing that cells that are actually infected but inhibited from producing virus through late stage assembly inhibitors are effectively eliminated by the immune system.

        • JumpCrisscross a day ago |
          > references you provided are prescribing information and to other drugs which actually are anti-retroviral

          The first reference is for literally this drug.

          > did not provide any reference showing that cells that are actually infected but inhibited from producing virus through late stage assembly inhibitors are effectively eliminated by the immune system

          I did not because this is the normal function of the immune system. The extraordinary claim, yours, is that these cells will somehow get missed by the immune system.

          • raylad 21 hours ago |
            Right. It’s prescribing information.

            As per whether infected cells that don’t display any evidence of virus on their surfaces would somehow be detected and killed or would undergo apoptosis, that might happen but I don’t find any evidence that it does.

  • Symmetry 2 days ago |
    During Covid the process chemists working on this, including my wife, and the group working on Remdesivir were the only ones not working from home at the Gilead's Edmonton facility.
  • MrGuts a day ago |
    How does a shot that prevents HIV fit in with the current Republican project of killing women and exposing everyone else to unchecked disease? It seems we are working to cross purposes here.