Anti-inflammatory painkillers like ibuprofen and naproxen are the most effective over-the-counter options for menstrual cramps. They work by blocking the specific chemical that causes your uterus to cramp in the first place, which makes them more targeted than general painkillers. But they’re far from your only option. Depending on the severity of your cramps, supplements, heat, hormonal birth control, and even ginger can all play a role.
Why Your Uterus Cramps
Understanding the cause helps explain why some remedies work better than others. Right before and during your period, the lining of your uterus releases a surge of chemicals called prostaglandins. These trigger your uterine muscles to contract forcefully, squeezing out the lining. They also narrow blood vessels in the area, reducing blood flow to the muscle. The combination of intense contractions and reduced blood supply is what creates that deep, aching pain.
Women with more painful periods have measurably higher levels of prostaglandins in their menstrual fluid, and those levels correlate directly with the severity of pain. Prostaglandin production rises throughout the second half of your cycle, then spikes once your period begins. This is why cramps are usually worst on the first one or two days of bleeding.
NSAIDs: The Most Effective OTC Choice
Ibuprofen and naproxen belong to a class of drugs called NSAIDs (non-steroidal anti-inflammatory drugs). Unlike acetaminophen (Tylenol), which dulls pain signals in the brain, NSAIDs block the enzyme your body uses to make prostaglandins. That means they reduce the actual cause of the cramping, not just your perception of it. The American College of Obstetricians and Gynecologists considers NSAIDs first-line treatment for menstrual cramps.
The key is timing. NSAIDs work best when you take them before prostaglandin levels peak, so starting at the very first sign of cramping or even a few hours before you expect your period gives them a head start. If you wait until pain is already severe, you’re playing catch-up against prostaglandins already circulating in the tissue.
Naproxen has a longer duration of action than ibuprofen, so you take it less frequently. The NHS recommends 500 mg as a starting dose for period pain, then 250 mg every six to eight hours as needed, with a maximum of 1,250 mg per day after the first day. Ibuprofen is taken more frequently but works just as well for most people. Either option is a solid choice.
Acetaminophen Works, but Less Well
If you can’t take NSAIDs due to stomach sensitivity or other reasons, acetaminophen (Tylenol) is a reasonable backup. A crossover study published in the American Journal of Obstetrics & Gynecology found that both ibuprofen and acetaminophen were significantly better than placebo for period pain. However, ibuprofen was the more potent option. It cut prostaglandin levels in menstrual fluid by more than half, while acetaminophen reduced them by roughly 40%. You’ll get some relief from acetaminophen, but if your cramps are moderate to severe, an NSAID will likely do more.
Heat: Surprisingly Effective
A heating pad or hot water bottle on your lower abdomen is one of the oldest remedies for cramps, and it holds up well. Heat relaxes the smooth muscle of the uterus, increases blood flow to the area, and can reduce the sensation of pain. Adhesive heat patches that stick to your clothing are a practical option if you need relief while you’re out of the house. Warm baths work on the same principle. Heat won’t eliminate severe cramps on its own, but it pairs well with an NSAID for layered relief.
Supplements That May Help
A few supplements have clinical support for reducing period pain, though the evidence is more limited than it is for NSAIDs.
Magnesium has been shown to decrease menstrual pain compared to placebo across multiple small trials. The suggested dose is 300 to 600 mg daily. Many women are mildly deficient in magnesium to begin with, so supplementing has few downsides. It can cause loose stools at higher doses, which is worth knowing.
Vitamin B1 (thiamine) at 100 mg daily improved menstrual pain in a clinical study, but only after at least 30 days of consistent use. This isn’t something you take on the day of your period and feel a difference. It requires a one- to three-month trial to know if it’s working for you.
Ginger has the strongest evidence of any herbal option. Multiple clinical trials have found that 750 to 2,000 mg of ginger powder per day, taken during the first three to four days of your cycle, is as effective as common NSAIDs for pain relief. The typical approach in studies was 250 mg capsules taken three to four times daily starting at the onset of menstruation. No significant side effects were reported.
Hormonal Birth Control for Ongoing Cramps
If your cramps are severe enough that you’re managing them every single month, hormonal contraception can reduce or eliminate them long-term. The combined pill, hormonal IUD (coil), contraceptive implant, and contraceptive injection all thin the uterine lining, which means less prostaglandin production and weaker contractions. The NHS recommends these methods even for people who don’t need contraception, specifically as a treatment for painful periods.
One important note: the copper IUD (non-hormonal coil) can actually make cramps worse, especially in the first few months. If you already have painful periods, it’s worth discussing this with your provider before choosing that option.
TENS Machines
A TENS (transcutaneous electrical nerve stimulation) unit is a small battery-powered device that sends mild electrical pulses through sticky pads on your skin. A Cochrane review of multiple trials found that both high-frequency and low-frequency TENS reduced menstrual pain compared to placebo, with no adverse effects reported in most studies. The evidence is classified as low-certainty, meaning it probably works but the research isn’t robust enough to say exactly how well. TENS units are inexpensive, reusable, drug-free, and available without a prescription, which makes them worth trying if you want to avoid or supplement medication.
When Cramps Don’t Respond to Treatment
Most menstrual cramps are “primary dysmenorrhea,” meaning there’s no underlying disease causing them. They’re common, and the options above will manage them well for the majority of people. But if NSAIDs and hormonal methods aren’t making a meaningful difference after three to six months, that’s a signal to investigate further. Conditions like endometriosis, fibroids, or adenomyosis can cause secondary dysmenorrhea, which looks and feels similar but requires different treatment. An ultrasound is typically the next step when medications alone aren’t providing relief.