Heavy menstrual bleeding with clots can often be reduced with over-the-counter anti-inflammatory medications, prescription options that prevent clot breakdown, or hormonal treatments that thin the uterine lining. If you’re soaking through a pad or tampon every hour for several consecutive hours, that crosses the clinical threshold for abnormally heavy bleeding and warrants prompt medical attention. The right approach depends on what’s causing the heavy flow, whether you want to preserve fertility, and how severely the bleeding is affecting your daily life.
What Counts as Abnormally Heavy
It’s easy to assume your period is “just heavy,” but there are specific markers that separate a heavy-but-normal flow from one that needs treatment. The CDC defines heavy menstrual bleeding as needing to change your pad or tampon after less than two hours, or soaking through one or more pads per hour for several hours in a row. Passing blood clots larger than a quarter also qualifies. If you’re doubling up on protection, skipping activities because of bleeding, or feeling exhausted and lightheaded during your period, those are signs your blood loss is significant enough to cause problems.
Chronic heavy periods frequently lead to iron deficiency. Ferritin levels below 30 μg/L indicate your iron stores are depleted, which explains the fatigue, brain fog, and dizziness that many people with heavy periods chalk up to “just being tired.” A simple blood test can check this, and correcting low iron can dramatically improve energy levels even before the bleeding itself is treated.
Why Heavy Bleeding With Clots Happens
Your body releases anticoagulants during your period to keep menstrual blood flowing freely. When the flow is very heavy, those anticoagulants can’t keep up, and the blood clots before it leaves your body. So clots are really a downstream effect of excessive bleeding rather than a separate problem.
The most common structural causes are uterine fibroids and polyps. Polyps are overgrowths of the uterine lining that respond to estrogen, and they can cause very heavy flow, irregular bleeding, or spotting between periods. Fibroids are muscular growths in or around the uterus that increase the surface area of the lining and interfere with the uterus’s ability to contract and slow bleeding. Hormonal imbalances, thyroid disorders, clotting disorders, and adenomyosis (where uterine lining tissue grows into the muscular wall) are other common culprits. An ultrasound is typically the first step in identifying what’s going on.
Anti-Inflammatory Medications
NSAIDs like ibuprofen and naproxen do more than manage cramps. They reduce the production of prostaglandins, hormone-like compounds that increase both pain and bleeding. In clinical studies, naproxen taken at the start of a period reduced menstrual blood loss by 37 to 54 mL compared to a placebo. Ibuprofen at 400 mg three times daily throughout the cycle reduced blood loss by about 36 mL.
The key detail: dose and timing matter. Lower doses of ibuprofen (600 mg total per day) didn’t show a meaningful reduction in one study, while higher, more frequent dosing did. Starting NSAIDs on the first day of bleeding, or even the day before if your cycle is predictable, gives the best results. For mild to moderate heavy bleeding, this is often the simplest first step since the medications are inexpensive and widely available.
Prescription Options That Reduce Flow
When over-the-counter options aren’t enough, several prescription medications can make a significant difference.
Tranexamic Acid
Tranexamic acid works by preventing the breakdown of blood clots that form naturally in the uterine lining during your period. Rather than thinning your blood or changing your hormones, it simply helps your body’s own clotting mechanism work more effectively. It’s taken as a tablet only during the days of heavy bleeding, not throughout the cycle. The American College of Obstetricians and Gynecologists lists it as a first-line option for acute heavy bleeding.
One important caveat: tranexamic acid should not be used by anyone with a history of blood clots, including deep vein thrombosis, pulmonary embolism, stroke, or retinal blood clots. It also cannot be combined with hormonal contraceptives containing estrogen or progestin, which rules out using it alongside birth control pills, patches, rings, or hormonal IUDs.
Hormonal Treatments
Combined oral contraceptives (birth control pills containing both estrogen and progestin) thin the uterine lining over time, which directly reduces the volume of tissue and blood shed each cycle. Oral progestins taken in specific patterns can do the same. These are among the most commonly prescribed treatments and work well for people whose heavy bleeding stems from hormonal imbalance or an overly thick uterine lining rather than structural problems like large fibroids.
The Hormonal IUD
A hormonal IUD that releases a small amount of progestin locally into the uterus is one of the most effective treatments available. In a clinical study, participants experienced a median blood loss reduction of 93.3% by the third cycle and 97.6% by the sixth cycle. Many people’s periods become extremely light or stop altogether within six months. For someone who wants long-term relief without daily medication and doesn’t need to avoid hormonal treatment, the hormonal IUD is often the most impactful single intervention. It also preserves fertility once removed.
Procedures for Bleeding That Doesn’t Respond
The American College of Obstetricians and Gynecologists recommends trying medical management first for most patients. Surgical or procedural options come into play when medications haven’t worked, aren’t tolerated, or when a structural problem like fibroids needs to be addressed directly.
Endometrial Ablation
This procedure destroys or removes the uterine lining using heat, cold, or radiofrequency energy. It’s done as an outpatient procedure with a short recovery. In the short term, it works well for abnormal bleeding and small fibroids close to the surface of the lining. However, it’s not appropriate if you want to get pregnant in the future. Most ablation techniques have size limits, with contraindications for fibroids over about 4 cm (slightly larger than a walnut). And among patients who had fibroids, adenomyosis, or polyps, 19 to 21% eventually needed a hysterectomy after ablation, so it’s not always a permanent fix.
Uterine Artery Embolization
For bleeding caused by fibroids specifically, uterine artery embolization cuts off the blood supply to the fibroids, causing them to shrink. It has over a 90% success rate for eliminating fibroid-related symptoms and avoids major surgery. Recovery takes about 7 to 10 days, compared to 4 to 6 weeks for surgical alternatives. Pregnancy is still possible afterward, though miscarriage rates may be slightly higher.
Hysterectomy
Removing the uterus is the only guaranteed permanent solution to heavy menstrual bleeding, but it’s a major surgery reserved for cases where other treatments have failed or aren’t appropriate. It permanently ends menstruation and fertility.
Nutritional Factors Worth Checking
Vitamin K plays a direct role in your body’s ability to form functional clotting factors. When vitamin K levels are low, whether from poor dietary intake, digestive absorption problems, or prolonged antibiotic use, the result can be defective clotting that worsens menstrual bleeding. Case reports and small studies have documented improvement in heavy periods after vitamin K deficiency was identified and corrected, either through increasing dietary intake of leafy greens and other vitamin K-rich foods or through supplementation.
This doesn’t mean vitamin K supplements will fix heavy periods in general. But if your bleeding is unusually heavy and you have risk factors for deficiency (restrictive diets, GI conditions, recent courses of antibiotics), it’s worth having your levels checked. Correcting a genuine deficiency is straightforward and can reduce bleeding severity meaningfully.
Iron supplementation is also important if your ferritin is low. Restoring iron stores won’t reduce bleeding, but it counteracts the anemia that heavy periods cause and can resolve symptoms like fatigue, difficulty concentrating, and shortness of breath with exertion.
What to Do Right Now
If you’re currently in the middle of a heavy episode, taking ibuprofen at 400 mg every eight hours can help reduce flow in the short term. Stay hydrated, and if you’re soaking through pads hourly for more than a few hours, seek medical care that day. For longer-term management, tracking your cycle and bleeding patterns (how many pads or tampons per day, clot size, cycle length) gives your provider the clearest picture of what’s happening. That tracking data, combined with blood work and an ultrasound, is usually enough to identify the cause and match you with a treatment that brings real relief.