--- title: Can Midol make you sleepy? What to know about side effects description: Can Midol make you sleepy? Yes, for some formulas. Here's what side effects to expect, how long they last, and when you should stop taking it. url: https://niyora.com/treatments/midol-side-effects/ --- - [Niyora](https://niyora.com/) - [Treatments](https://niyora.com/treatments/) - Can Midol make you sleepy? Side effects, including mood Treatment # Can Midol make you sleepy? Side effects, including mood Yes, some Midol formulas can make you sleepy, depending on which one you take. Midol PM has a sedating antihistamine made for nighttime, Midol Complete pairs a milder antihistamine with caffeine to offset drowsiness, and Midol Teen and Extended Relief contain neither. Most side effects are mild and clear within hours. Updated 13 October 2026 Niyora editorial Limited evidence Strength of evidence Limited Only small or early studies so far. - None - Limited - Mixed - Moderate - Strong ## At a glance - Midol isn't one formula. Complete, PM, Teen, and Extended Relief each mix different ingredients, so side effects vary by which box you pick. - Drowsiness comes from the antihistamine in Complete and PM. Complete also adds caffeine partly to counter that drowsiness. - Only Complete contains caffeine, which can cause jitteriness or trouble sleeping in sensitive people, but that's a caffeine effect, not a mood treatment. - No Midol ingredient is linked to weight gain. Bloating before a period comes from hormone shifts, not the medication. - If cramps or mood symptoms take a week of every month even with Midol, that pattern is worth tracking and bringing to a doctor. ## Strength of evidence Limited evidence - None - Limited - Mixed - Moderate - Strong Midol's formulas aren't tested as whole products in trials; side effects follow known effects of acetaminophen, NSAIDs, antihistamines, and caffeine. A cohort study found no caffeine-PMS link [7]. SSRIs, not Midol, are the guideline treatment for premenstrual mood symptoms [1] [2] [3] [4] [5] [6] [8]. ## Can Midol make you sleepy? The full list of side effects Midol isn't one pill. The brand covers several formulas: Midol Complete (acetaminophen, caffeine, and the antihistamine pyrilamine maleate), Midol PM (acetaminophen plus the stronger antihistamine diphenhydramine, made for nighttime), Midol Teen (acetaminophen and the diuretic pamabrom, no caffeine), and Midol Extended Relief (naproxen sodium alone). It's marketed for period cramps and other PMS symptoms, depending on the formula you pick, and which side effects you get depends on which one you took. Across the line, the most commonly reported effects are: - Nausea or an upset stomach - Drowsiness (from the antihistamine in Complete and PM) - Dry mouth or dizziness - Jitteriness, restlessness, or a faster heartbeat (from the caffeine in Complete) - Stomach irritation (from the naproxen in Extended Relief, especially without food) - A rare allergic reaction: rash, swelling, or trouble breathing Most of these are mild and pass on their own. Pyrilamine and diphenhydramine are both antihistamines, which is why sleepiness shows up with Complete and especially with PM, which is built for bedtime use. ## Can you take Midol on an empty stomach? Acetaminophen, the painkiller in Complete, PM, and Teen, is generally fine on an empty stomach. It doesn't irritate the stomach lining the way ibuprofen or naproxen can. Midol Extended Relief is different: it's pure naproxen sodium, an NSAID. NSAIDs are more likely to cause stomach pain, heartburn, or irritation when taken without food, so it's worth having something in your stomach first, even a cracker or a glass of milk. Caffeine on an empty stomach can also make nausea or jitteriness worse for some people, which matters for Midol Complete specifically. If your stomach is already unsettled before your period, taking Complete with a small meal is a reasonable precaution. For exact timing and how much to take, see [Midol dosage: how much and when](https://niyora.com/treatments/midol-dosage/). ## How much caffeine is in Midol? Only Midol Complete adds caffeine. It's there on purpose, to counteract some of the drowsiness from the pyrilamine maleate in the same caplet. Midol Teen, Midol PM, and Midol Extended Relief don't contain caffeine at all. If you're sensitive to caffeine, or you're watching your intake for another reason, Complete is the formula to check. The exact milligram amount is on the box, and if you're also having coffee, tea, or soda that day, the amounts add up. For the full ingredient list, see [What's in Midol, and does it help PMS?](https://niyora.com/treatments/midol/) ## Can Midol affect your mood? Caffeine and antihistamines both have effects beyond the symptom they're added for. Caffeine can cause jitteriness, restlessness, or trouble sleeping in people who are sensitive to it, and that can feel like a mood shift even though it's a stimulant effect, not a mood treatment. The antihistamine in Complete or PM can have the opposite effect, making you feel flat or foggy as it sedates you. Neither is the same as Midol treating the mood symptoms of PMS or PMDD: irritability, anxiety, or low mood. Midol isn't built for that. SSRIs are the treatment guidelines recommend for premenstrual mood symptoms, and a controlled trial found they can work within days when taken only in the second half of the cycle, days instead of the 4 to 6 weeks they typically take for depression [1]. A case-control study nested within a large prospective cohort also found no link between caffeine intake and PMS risk overall, so Complete's caffeine isn't a known trigger for premenstrual symptoms in general, even though it can still make an individual person feel jittery [7]. Niyora is a PMS and PMDD support app. If anger or anxiety spikes and you can't tell whether it's the caffeine, the week, or both, Moon lets you write down what happened, look at it from another angle, and draft what you want to say before you react. What the research says A controlled trial found that an SSRI could ease premenstrual irritability within a few days when started partway through the luteal phase, days faster than SSRIs typically take for depression [1]. ## Can Midol cause weight gain? No ingredient in any Midol formula is linked to weight gain. Acetaminophen, naproxen, caffeine, and the antihistamines in Complete and PM don't cause fat or fluid gain on their own. Bloating before a period is common, but it comes from the hormone shifts of PMS itself, not from the medication you take for it. Midol Teen actually contains pamabrom, a mild diuretic meant to ease that bloating rather than add to it. Weight changes that track with your cycle, rising before your period and settling back down after, are usually water weight related to hormones, not calories. If you notice new or sudden swelling, especially in your hands, face, or legs, that's worth mentioning to a doctor, since it's more likely tied to another cause than to anything in a Midol caplet. ## How long do side effects last? Most Midol side effects are short. Acetaminophen and caffeine are cleared from your system within a matter of hours, and drowsiness or jitteriness from a single dose usually fades well before your next one is due. Taking Midol on a regular dosing schedule across your period, as the label allows, can mean side effects like stomach upset or sleepiness repeat with each dose rather than build up over days. If a side effect gets worse with each dose, lasts well past when the medication should have worn off, or shows up alongside something new like chest tightness or swelling, stop taking it and check with a pharmacist or doctor before your next dose. For how long the drug takes to start working in the first place, see [How long does Midol take to work?](https://niyora.com/treatments/how-long-does-midol-take-to-work/) ## When should you stop taking Midol? Stop and get medical help if you notice signs of an allergic reaction: rash, swelling of the face or throat, or trouble breathing. If you've taken more acetaminophen than the label allows across different products, call a doctor or poison control right away, even if you feel fine. Don't wait for signs like yellowing skin, eyes, or unusually dark urine. Those can show up only after liver damage has started. With the naproxen in Extended Relief, stop if you get severe stomach pain, vomiting that looks like coffee grounds, or black, tarry stool. If Midol isn't controlling your cramps or your mood symptoms, and the pattern looks like it could be PMDD rather than PMS, [finding a PMDD specialist](https://niyora.com/care/pmdd-specialist/) is the next step. When to see a doctor If cramps or mood symptoms take a week of every month even with Midol, see a GP or gynecologist and bring two months of daily notes. If you notice signs of liver or stomach trouble, see a doctor right away rather than waiting to track it. ## What are the alternatives to Midol? If cramps are the main issue, an NSAID alone, ibuprofen or naproxen without the added antihistamine or caffeine, treats the pain with fewer extra effects. For the mood symptoms of PMS or PMDD, irritability, anxiety, low mood, or rejection sensitivity, Midol isn't the right tool. Guidelines point to SSRIs, which multiple trials and reviews show reduce premenstrual symptoms, including when taken only in the luteal phase [2] [3] [4] [5] [6] [8]. Some hormonal contraceptives and cognitive behavioral therapy are also guideline-recommended options. A doctor decides what fits, based on your symptoms and history. ## Questions people ask Does Midol make you sleepy? + Midol's effect on sleepiness depends on the formula. Midol PM contains diphenhydramine, a sedating antihistamine made for nighttime use, so it's meant to make you sleepy. Midol Complete has a milder antihistamine plus caffeine to offset some of that drowsiness. Midol Teen and Extended Relief don't contain an antihistamine, so sleepiness is less likely with either. What is Midol used for? + Midol is an over-the-counter brand for period cramps and other PMS symptoms like bloating. Different formulas combine a pain reliever (acetaminophen or naproxen) with an antihistamine, caffeine, or a mild diuretic, depending on whether the goal is daytime relief, nighttime sleep, or less bloating. How much caffeine is in Midol? + Only Midol Complete contains caffeine, added to help offset the drowsiness from its antihistamine. Midol Teen, Midol PM, and Midol Extended Relief have none. The exact amount is on the box, and it's worth checking if you're also having coffee, tea, or soda, since the caffeine from both sources adds up. Can you take Midol on an empty stomach? + Acetaminophen-based formulas (Complete, PM, Teen) are generally fine on an empty stomach. Midol Extended Relief contains naproxen, an NSAID, which is more likely to cause stomach irritation without food. If your stomach is sensitive, taking any formula with a small meal is a reasonable precaution. Can Midol cause mood swings? + Midol itself isn't a mood treatment. Caffeine in Midol Complete can cause jitteriness or anxiety in people sensitive to it, which can feel like a mood shift, and the antihistamine in Complete or PM can make you feel sedated or foggy. Neither targets the mood symptoms of PMS or PMDD the way SSRIs do. ## Sources - 1. [Short onset of action of a serotonin reuptake inhibitor when used to reduce premenstrual irritability](https://doi.org/10.1038/npp.2008.86), Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology, 2009 - 2. [Selective serotonin reuptake inhibitors for premenstrual syndrome and premenstrual dysphoric disorder](https://doi.org/10.1002/14651858.cd001396.pub4), The Cochrane database of systematic reviews, 2024 - 3. [Intermittent selective serotonin reuptake inhibitors for premenstrual syndromes: A systematic review and meta-analysis of randomised trials](https://doi.org/10.1177/02698811221099645), Journal of psychopharmacology (Oxford, England), 2023 - 4. [Selective serotonin reuptake inhibitors for premenstrual syndrome](https://doi.org/10.1002/14651858.cd001396.pub3), The Cochrane database of systematic reviews, 2013 - 5. [Efficacy of selective serotonin-reuptake inhibitors in premenstrual syndrome: a systematic review](https://doi.org/10.1016/s0140-6736(00)02754-9), Lancet (London, England), 2000 - 6. [Selective serotonin reuptake inhibitors for premenstrual syndrome and premenstrual dysphoric disorder: a meta-analysis](https://doi.org/10.1097/aog.0b013e31816fd73b), Obstetrics and gynecology, 2008 - 7. [A prospective study of caffeine and coffee intake and premenstrual syndrome](https://doi.org/10.3945/ajcn.115.127027), The American journal of clinical nutrition, 2016 - 8. [Selective serotonin reuptake inhibitors for premenstrual syndrome](https://doi.org/10.1002/14651858.cd001396.pub2), The Cochrane database of systematic reviews, 2009 Ask AI about this page Copy prompt ChatGPT ↗ Claude ↗ Perplexity ↗ Google AI Mode ↗ Grok ↗ On this page - [Can Midol make you sleepy? The full list of side effects](#can-midol-make-you-sleepy-the-full-list-of-side-effects) - [Can you take Midol on an empty stomach?](#can-you-take-midol-on-an-empty-stomach) - [How much caffeine is in Midol?](#how-much-caffeine-is-in-midol) - [Can Midol affect your mood?](#can-midol-affect-your-mood) - [Can Midol cause weight gain?](#can-midol-cause-weight-gain) - [How long do side effects last?](#how-long-do-side-effects-last) - [When should you stop taking Midol?](#when-should-you-stop-taking-midol) - [What are the alternatives to Midol?](#what-are-the-alternatives-to-midol) - [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 What's in Midol, and does it help PMS? Treatment Midol for PMS: does it work? Treatment Midol dosage: can you take it on an empty stomach? Treatment How long does Midol take to work? Treatment PMS treatment: what actually helps Condition What is PMS? Premenstrual syndrome, explained Treatment Medicine for PMS cramps before your period