--- title: Low dose naltrexone for PMS: what the evidence shows description: No published trial has tested low dose naltrexone for PMS. Here's what's known about safety, timing and evidence-backed alternatives that do work. url: https://niyora.com/treatments/ldn-for-pms/ --- - [Niyora](https://niyora.com/) - [Treatments](https://niyora.com/treatments/) - Low-dose naltrexone for PMS: does it work? Treatment # Low-dose naltrexone for PMS: does it work? Low-dose naltrexone hasn't been tested in a randomized trial for PMS, so there's no trial evidence that it works. It's an opioid receptor blocker used off-label, on theory and small clinical experience rather than controlled data. Luteal-phase SSRIs have placebo-controlled trial evidence in PMS specifically. The drospirenone-containing pill has one placebo-controlled trial, but in PMDD, not PMS. Updated 14 October 2026 Niyora editorial No good evidence yet Strength of evidence None No good trials have tested it yet. - None - Limited - Mixed - Moderate - Strong ## At a glance - No randomized controlled trial has tested low-dose naltrexone against placebo for PMS specifically. - Naltrexone is an opioid receptor blocker, approved for addiction, and used off-label at low doses for pain and inflammatory conditions. - Reported side effects at low doses include nausea, vivid dreams and trouble sleeping, usually easing within the first one to two weeks. - People taking opioid medication can't safely take naltrexone, since it can cause sudden, severe withdrawal. - Other PMS treatments, like luteal-phase SSRIs and the drospirenone-containing pill, have placebo-controlled trial evidence behind them already. ## Strength of evidence No good evidence yet - None - Limited - Mixed - Moderate - Strong No randomized controlled trial has tested low-dose naltrexone against placebo for PMS specifically. Evidence for other low-dose PMS treatments, like luteal-phase SSRIs and the drospirenone-containing pill, comes from placebo-controlled trials; naltrexone's use for PMS rests on off-label extrapolation, not direct study. ## Does low-dose naltrexone work for PMS? No one knows yet. No published trial has tested low-dose naltrexone against placebo for PMS. Naltrexone blocks opioid receptors throughout the brain and body. It's approved for alcohol and opioid use disorder. Some doctors prescribe it off-label, at a much lower dose, for chronic pain and autoimmune conditions, and that off-label use is why it comes up for PMS at all. The theory is that it might calm an overactive stress response, though this hasn't been tested directly in women with PMS. Compare that to other PMS treatments, which do have trial data behind them: | Option | Evidence for PMS | Evidence grade | | --- | --- | --- | | Low-dose naltrexone | No published randomized trials | None | | Luteal-phase sertraline or fluoxetine | Several placebo-controlled trials, symptoms improved [2] [4] | Moderate | | Drospirenone-containing contraceptive pill | One large placebo-controlled trial, but in women with PMDD, not PMS [1] | Limited (PMDD only, not studied in PMS) | | Low-dose GnRH agonist | One small crossover trial, symptoms improved [3] | Limited | | Low-dose danazol | One small crossover trial, symptoms improved [5] | Limited | **Right now, the honest grade for low-dose naltrexone in PMS is no evidence yet.** Nobody has checked naltrexone against placebo for PMS in a controlled way, so there's no evidence either way. If a doctor suggests it, it's worth asking whether they're basing that on a trial, your specific case, or general off-label experience. ## How long does it take to work? There's no PMS-specific timeline, since no trial has tracked naltrexone symptom scores across a cycle. In other off-label uses, like chronic pain, people and prescribers typically wait a few weeks before judging whether low-dose naltrexone is helping. Some side effects, like sleep disruption, tend to show up right away and settle within the first week or two, before anyone can tell if the underlying symptoms have changed. If you and your doctor decide to try it, a reasonable plan is to track your symptoms daily for at least two cycles before deciding either way. PMS varies cycle to cycle, so one cycle doesn't tell you much on its own. The [DRSP chart](https://niyora.com/tools/drsp-chart/) is built for exactly this kind of daily tracking. For the doses and cycle timing some clinicians use off-label, see [low-dose naltrexone dosage](https://niyora.com/treatments/ldn-dosage/). Right now Right now, before you decide on treatment - 1 Name what you're feeling in one sentence, out loud or written down. - 2 If you're about to say something sharp, leave the room and set a 20-minute timer before you come back. - 3 Write down what happened today, while it's still fresh. - 4 Try Niyora's Moon to see the moment from another angle and draft a reply before sending. Niyora walks you through this when it happens: - Calm down - - See it another way - - Choose what to say ## What are the side effects? Because naltrexone hasn't been tested in PMS trials, side-effect information comes from its use in other conditions, at similar low doses. Commonly reported effects include: - Nausea, especially in the first few days - Vivid or unusual dreams - Trouble falling or staying asleep - Headache - Low energy or fatigue Most of these ease within the first one to two weeks as your body adjusts. They're usually mild enough that people stay on treatment, though not everyone tolerates it well. Naltrexone doesn't carry the weight changes or loss of interest in sex sometimes linked to hormonal PMS treatments, which is part of its appeal off-label. Still, any new or worsening symptom after starting a medication is worth mentioning to your prescriber rather than waiting it out on your own. ## Who should avoid it? Naltrexone blocks opioid receptors, so it isn't safe to combine with opioid medication. It can cause sudden, severe withdrawal in anyone currently using opioids, including some prescription painkillers. Other reasons a doctor might advise against it: - Active liver disease, since naltrexone is processed by the liver - Pregnancy or trying to conceive, where safety data is limited - A planned surgery that will need opioid pain relief soon - A known allergy to naltrexone A doctor needs to make this call. **A doctor needs your full medication list and health history before naltrexone makes sense for you.** If PMS takes over a week of every month, see a GP or gynecologist and bring two months of daily notes. A [PMDD specialist](https://niyora.com/care/pmdd-specialist/) can help if the pattern feels closer to PMDD than PMS, since the two are treated differently. ## What else helps alongside it? While naltrexone's evidence is thin, other PMS treatments already have trials and guidelines behind them. - SSRIs like sertraline, taken only in the days before your period, improved PMS symptoms more than placebo in a trial of over 300 women (The Journal of Clinical Psychiatry, 2006) [4]. - Combined pills containing drospirenone reduced mood, physical and behavioral symptom scores more than placebo in a 450-woman trial of women with PMDD, not PMS (Obstetrics and Gynecology, 2005) [1]. This hasn't been directly tested in PMS. - Cognitive behavioral therapy is recommended by major guidelines as an evidence-based option for PMS and PMDD. None of this rules out naltrexone if your doctor has a specific reason to try it, say for pain alongside PMS. But these options are worth discussing first, since they've been tested for PMS specifically, not borrowed from another condition. For a full rundown of what's proven, see [PMS treatment: what actually helps](https://niyora.com/treatments/pms-treatment/). If PMDD fits your pattern better than PMS, [naltrexone for PMDD](https://niyora.com/treatments/ldn-for-pmdd/) covers that evidence separately. ## What helps in the moment? Medication decisions take time. There's a conversation with a doctor, maybe weeks of waiting to see if something works. The moment you're in right now doesn't wait that long. If you're in the days before your period right now: - Name what you're feeling in one sentence, out loud or written down. - If you're about to say something sharp, leave the room and set a 20-minute timer before you come back. - Write down what happened today, while it's still fresh, before the day blurs into how bad you felt. Niyora is a PMS and PMDD support app. Its Moon feature lets you write down what happened, see it from another angle, and draft a reply you can hold onto for 20 minutes instead of sending right away. None of this replaces treatment. It's just something to do tonight, while you and a doctor work out whether naltrexone, an SSRI, or something else is worth trying. ## Questions people ask Is low-dose naltrexone FDA-approved for PMS? + No. Naltrexone is approved for alcohol and opioid use disorder. Using it for PMS, usually at a much lower dose, is off-label, meaning a doctor can prescribe it based on clinical judgment, but no regulator has reviewed it for PMS and no published trial has tested it against placebo for PMS. Does naltrexone help PMDD the same way it might help PMS? + PMDD and PMS are different diagnoses, with different symptom thresholds, so the evidence doesn't automatically carry over. If PMDD's stricter criteria fit your pattern better than PMS, read about [naltrexone for PMDD](https://niyora.com/treatments/ldn-for-pmdd/) rather than assuming this page's evidence gap applies the same way there. What dose of naltrexone is used for PMS? + Because no trial has tested naltrexone for PMS, there's no established PMS-specific dose. Off-label low-dose naltrexone for other conditions is typically far below the dose used for addiction treatment. For the ranges some clinicians use off-label and how timing works across the cycle, see [low-dose naltrexone dosage](https://niyora.com/treatments/ldn-dosage/). Can I take naltrexone with birth control for PMS? + There's no known direct interaction between naltrexone and hormonal contraceptives, but combining any two treatments for PMS should go through your doctor. They can check your full medication list, including painkillers, since naltrexone blocks opioid medication and can cause sudden withdrawal if combined. What's proven to work for PMS instead of naltrexone? + Luteal-phase SSRIs like sertraline and cognitive behavioral therapy have trial or guideline support for PMS. The drospirenone-containing pill has trial evidence in PMDD, not PMS directly. [PMS treatment: what actually helps](https://niyora.com/treatments/pms-treatment/) breaks down the evidence for each, so you can bring specific options to your next appointment. ## Sources - 1. [Efficacy of a new low-dose oral contraceptive with drospirenone in premenstrual dysphoric disorder](https://doi.org/10.1097/01.aog.0000175834.77215.2e), Obstetrics and gynecology, 2005 - 2. [Low doses of fluoxetine for the treatment of emotional premenstrual syndrome: a randomized double-blind, placebo-controlled, pilot study](https://doi.org/10.1016/j.psyneuen.2023.106360), Psychoneuroendocrinology, 2023 - 3. [Treatment of premenstrual syndrome with gonadotropin-releasing hormone agonist in a low dose regimen](https://doi.org/10.1080/j.1600-0412.1999.781011.x), Acta obstetricia et gynecologica Scandinavica, 1999 - 4. [Low-dose sertraline in the treatment of moderate-to-severe premenstrual syndrome: efficacy of 3 dosing strategies](https://doi.org/10.4088/jcp.v67n1020), The Journal of clinical psychiatry, 2006 - 5. [Premenstrual syndrome: beneficial effects of periodic, low-dose danazol](https://doi.org/10.1097/00006254-198801000-00018), Obstetrics and gynecology, 1987 Ask AI about this page Copy prompt ChatGPT ↗ Claude ↗ Perplexity ↗ Google AI Mode ↗ Grok ↗ On this page - [Does low-dose naltrexone work for PMS?](#does-low-dose-naltrexone-work-for-pms) - [How long does it take to work?](#how-long-does-it-take-to-work) - [What are the side effects?](#what-are-the-side-effects) - [Who should avoid it?](#who-should-avoid-it) - [What else helps alongside it?](#what-else-helps-alongside-it) - [What helps in the moment?](#what-helps-in-the-moment) - [Questions](#faq) Niyora PMS & PMDD support For the hard moment before your period. Private, no account. [Get it on iPhone](https://apps.apple.com/app/niyora-pms-emotions/id6764561688) ## Keep reading Treatment Low-dose naltrexone for PMDD: does it work? Treatment Low-dose naltrexone for PMDD: how much and when Treatment PMS treatment: what actually helps Condition What is PMS? Premenstrual syndrome, explained Care guide Finding a PMDD specialist Guide All 26 research findings