Ha, interesting. I actually caught myself getting carried away by the idea of a miracle cure... really, I was thinking: Wdnt it be great only having to take LDN, leave the 13 supps, the hours of self-treatment and treatment behind me... Oooooh yessss....
So, I went another route first, was getting really into it and interested: First: It's very hard to get here. My pharmacy can't get it for me and I can't get it from any pharmacy via my usual online pharmacy price comparison portal, up to now I've "only" found one compounding pharmacy far in the South that said it does it. Maybe there's a compounding pharmacy closer, not sure how to work that out. One on a forum got it from "overseas", but warned they wdve preferred a doc to help them. Someone else got the 50mg pills prescribed by their doc and tried quartering, but that was still too much - there might be a workaround there.
The compounding pharmacy I phoned and asked how best to get a prescription willingly shared the name of a doc who'd prescribe it. I'd also found another doc who does. Both also in the South. However both come across on their websites, on youtube and on a doc rating platform as emotional, exuberant, naturopathic/alternative, evangelizing (is there a better word?) and polarizing. Whilst the first compared herself to US functional docs, her methods & explanations are far off into the esoteric areas (e.g. photon therapy), her main med for FM is guaifenesin (not LDN), she "knows" her fibromyalgia was caused by Lyme disease, explains everything oversimply, "knows everything", has many exuberantly positive ratings, but also many who describe her as chaotic, unstructured, not able to adequately explain when questions are asked. some of her explanations are good, some fanciful/weird. The other one is a radical vaccination opponent, gives a speech on a demonstration about a pediatrician who was charged with waiting too long before a baby was taken to a clinic cos of malnutrition. That pediatrician believes in indigo children, that the measles virus is not responsible for measles and "breatharianism" (we could nourish ourselves from sunlight alone).
Now I'm definitely not at all saying that the people/docs who advocate it are all like this at all, but it started me wondering if a) the evangelizing exuberance causes the polarizing and if the people who do this are susceptible to LDN, because it is a bit nonconformist & a bit mysterious, and perhaps also they are having a strong placebo effect (which is good for them), or praps the other way round.
So I was interested not in what a pro-LDN website had to say, but first one FM-forum. The result isn't catastrophic, but sobering: Of 20 people 5 (25%) found it pretty good to brilliant (some of these loved exclamation marks...), 6 (30%, together 55%) found it helped a bit along with other things, and sfx were OK, however 7 (35%) found the symptoms got considerably worse, either immediately or after about a month or so and 2 (10%, together 45%) "had" no fx at all (one of them cdnt remember any).
3 of the 5 people who found it good had been on it for 2, 6 and 8 months - I wdnt rule out that they didn't post any more, because they were feeling too good. It didn't work for the only man amongst them, FWIW. One person was narked about how much one of the main proponents was plugging it and asked her to refrain from doing that.
The main doc/writer I've now seen using/prescribing it is the fibromite Ginevra Liptan.
A good neutral link I found along the way was once again healthrising, using the positive words "an impressive grassroot movement" for LDN proponents.
The other side to that is the way LDN proponents often tout it, saying "check it out", "look into" and "spread the word", "the reviews are very subjective to say the least" which in combination with the aura of a miracle cure (cured, all symptoms) makes it tough to hear and not nice. OK, it is nice to get some hope first, like me yesterday, I was flying a bit, "what if?" - brushed my usual skepticism aside a little, but I don't mind playing around, and I was guessing I'd be finding a bit of a snake pit (is there a better one?). Esp. when so many people are having a tough enough fibro-life and then people do try it and it gets worse ... and just to make sure why I say snake pit, I quote: "its getting really miserable", "worsened my FM unbearably", "I became severely nauseous and heaving" &"I think it may have caused my liver enzymes to elevate", "6 months later and things are just worse" and "Side effects are baaad pain". The upside of this is, you can just stop it, without even weaning it off and these effects stop quickly.
Some said that LDN catalyzes your body to produce it's own pain killers or similar, so you can reduce it, but others you have the same pain if you stop it (e.g. the 2009 study), so it seems it's fogging over and not curing. One of the healthrising webpages summarizes about Younger's 2013 study with 31 women "LDN was helpful in reducing about 30% of the pain in about 60% of the patients." which sobers up the implication that it can reduced 100% of the pain in 100% of the patients. I don't think my slipshod forum testimony statistics contradict those findings of Younger's studies (he's at Stanford by the way), but I'm disconcerted that this study did not find any of the harsh sfx quoted above. Also on healthrising it was implied that it your FM maybe mainly has an autoimmune component (seemed to be found in one of the studies), then the likelihood it might work might be higher. I also get the feeling that maybe a mood component makes it more likely, and that if works on one part of fibro - if all the other symptoms come from that, it may work a bit 'miraculously', but we are too different to bet on that.
Bottom line I think: No "need" to plug this stuff especially. It may be worth trying, but it may have bad (s)fx. If you do try it, it sounds better to not keep to the 4.5mg dose of Younger's studies, even if docs have sometimes forced people to: I'd start with .5mg or if possible even less and increase slowly, finding your own dose: that may be part of the "secret". Apparently even small differences in dose make a lot of difference. The people it was helping were taking 9mg, 3.8mg or 1mg, one who it wasn't had gone down to 0.1mg. (Reminds me of getting a 2mg melatonin ER pill prescribed and breaking off 1mcg bits (5%) - and that still being too much for me, almost the same zombifying effect as the 2mg ER or the 1mg without the ER.) Normally you'll need to find a doc who'll prescribe it and a compounding pharmacy to make them (if you haven't got the unlikely possibility of getting the 50mg prescribed, grinding them and putting that into 11 equal small heaps ... and re-dividing each of those into 9 further equal heaps... probably needing a magnifying glass or an analytical balance...).