How it went
Did it last?
- 2 of 11 said the benefit wore off (including the 1 who relapsed).
- No one said they needed to keep it up to stay well.
Read from what people wrote. A story that ends without a follow-up counts as lasting, so treat these as minimums.
| Outcome described | Accounts | Share |
|---|---|---|
| Full recovery | 1 | 9% |
| Near-full | 3 | 27% |
| Substantial | 3 | 27% |
| Partial | 3 | 27% |
| Relapsed | 1 | 9% |
| No benefit | 0 | 0% |
By how ill people were
| Severity at worst | How it went | n | Recovered |
|---|---|---|---|
| Mild | 1 | 100% | |
| Moderate | 4 | 25% | |
| Severe | 4 | 50% |
2 accounts don’t say how ill the person was.
Who published these accounts
Right-hand number: share describing a full or near-full recovery. Pages that sell something, and advocacy sites, tend to publish only the successes.
How often it comes up
Posts that mention H1 antihistamines, per 1,000 posts each year. Hover a point for the count.
Show as a table
| Year | Posts mentioning it | All posts | Per 1,000 |
|---|---|---|---|
| 2009 | 0 | 184 | 0.0 |
| 2010 | 1 | 682 | 1.5 |
| 2011 | 1 | 704 | 1.4 |
| 2012 | 1 | 1,491 | 0.7 |
| 2013 | 2 | 1,708 | 1.2 |
| 2014 | 5 | 2,352 | 2.1 |
| 2015 | 5 | 2,158 | 2.3 |
| 2016 | 15 | 1,431 | 10.5 |
| 2017 | 1 | 3,110 | 0.3 |
| 2018 | 2 | 2,201 | 0.9 |
| 2019 | 2 | 1,075 | 1.9 |
| 2020 | 0 | 2,581 | 0.0 |
| 2021 | 4 | 1,867 | 2.1 |
| 2022 | 1 | 1,166 | 0.9 |
| 2023 | 6 | 1,000 | 6.0 |
| 2024 | 6 | 1,237 | 4.9 |
| 2025 | 1 | 1,019 | 1.0 |
| 2026 (so far) | 2 | 840 | 2.4 |
Posts in the forum threads we archived, 26,806 in all, counted per year. A mention means the post names the treatment, not that the writer took it. These threads all contain a recovery story, so they show what those communities discussed, not everyone with ME/CFS or long COVID. All trends
All 11 accounts
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List of ME/CFS Recovery and Improvement Stories (page 14 discussion)
ixikd2025 credited a broad, kitchen-sink regimen spanning stimulant, mitochondrial, antihistamine/MCAS, and lifestyle interventions (meditation, running, acupuncture) for significant improvement. With so many concurrent changes, no single component could be…
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My long covid recovery recap: the timeline and tools
Ariel Conn's recovery centered on mind-body approaches: Claritin as one of only two things that helped in her first 18 months, then somatic meditations, Nicole Sachs' JournalSpeak journaling method starting December 2021, somatic and Internal Family Systems…
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Several long-COVID patients report improvements from antihistamines (Emeline)
Trialed loratadine 10mg twice daily plus famotidine 40mg once daily over a 34-day self-trial, more than four years into her illness; she initially dosed in the morning, then moved the famotidine to the evening after two weeks, which subjectively felt like a…
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Several long-COVID patients report improvements from antihistamines (Rich D)
Tried Singulair (montelukast), which produced significant, though not huge, improvement within about a week, while Pepcid (famotidine) and Zyrtec (cetirizine) had no effect for them. They suggest antihistamines are most useful for long-COVID patients who…
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Several long-COVID patients report improvements from antihistamines
Takes cetirizine nightly (dose not specified) since 2021, along with probiotics, for long-COVID symptoms. They describe the antihistamine as the only thing that quiets what they call a constant cytokine-storm reaction, and say it has also calmed…
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Ten Months of Long COVID
Marie Sanchez Nelson describes taking cetirizine, an antihistamine that calms her nervous system "in minutes," and had started nattokinase just three days before this post, which she hypothesizes may help repair blood vessels; no doses or durations are given…
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An ME/CFS Expert Helps a Long-COVID Patient Recover
A nineteen-year-old developed POTS and mast cell symptoms after a mild PCR-confirmed COVID infection, leaving him with a wellness score of 45 out of 100 and out of in-person classes for about fifteen months. Under Dr Peter Rowe at Johns Hopkins he was…
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Impact of extended-course Paxlovid in established Long COVID (Case 2)
Case 2, a 45-year-old woman about 11 months into Long COVID with orthostatic intolerance, tachycardia, short-term memory loss, word-finding trouble, fatigue, PEM and MCAS symptoms, took a 15-day extended course of Paxlovid (nirmatrelvir/ritonavir) in…
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Lucie's Surprisingly Simple Chronic Fatigue Syndrome Recovery Story
Lucie became ill with relatively mild but disabling ME/CFS around 2011, unable to exercise and with her work and social life sharply curtailed. Following pacing advice and an orthostatic-intolerance protocol of high salt and 2.5 litres of water daily, she…
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progess report..feeling almost normal
About 1.5 years into severe illness (bedridden, lightheaded, shaking, forced to leave her home), she combined cholestyramine and Valtrex for 4 months, methylB12 injections tapering from daily to every other day over 4 months, plus ongoing sublingual…
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Antihistamines for sleep
Used Benadryl (diphenhydramine) regularly for years as one layer of a multi-drug sleep regimen alongside chlorpheniramine, Dramamine, doxylamine and Atarax, for chronic insomnia with ME/CFS affecting both falling and staying asleep. He says he "swore by" it…