Starting at the first sign of your period works better than waiting for the pain to build. Here’s how to use ibuprofen and naproxen well, and what to try if you can’t take them.
Yes, most women can take ibuprofen for period cramps, and it’s one of the most effective treatments available. The key is timing. Take it at the first sign of bleeding or cramping, or a day before if your periods are predictable, rather than waiting until the pain is strong. Take it with food, follow the dose on the label, and keep taking it at regular intervals for the first day or two. If it still doesn’t help after two or three cycles of taking it this way, see a doctor.
Why timing matters
Period cramps are caused by prostaglandins, chemicals your uterus releases as your period starts. They make the muscle contract hard. Ibuprofen and naproxen work by blocking the production of prostaglandins. They stop more from being made, but they don’t remove what’s already there. That’s why taking them early works much better than taking them once the pain has peaked. Many women who say ibuprofen “doesn’t work” for them are taking it too late.
How to take it well
- Start early: at the first twinge or first spotting, or the day before if your period is regular.
- Take it with food or milk to protect your stomach.
- Follow the label dose, and don’t take more than it allows.
- Keep to a schedule for the first one to two days, rather than waiting for the pain to return.
- Add heat. A heating pad works well alongside it, including on your lower back if your back hurts on your period.
- Don’t combine NSAIDs. Ibuprofen, naproxen and aspirin belong to the same family, so take only one.
Ibuprofen or naproxen for period cramps?
Both are NSAIDs that lower prostaglandins, and research hasn’t shown one to be clearly better than the other for period pain. The main difference is how long each dose lasts:
- Ibuprofen (Advil, Motrin) acts quickly and is taken every six to eight hours.
- Naproxen (Aleve, sold over the counter as naproxen sodium) lasts longer, usually 8 to 12 hours a dose, so you take fewer doses a day. A dose at bedtime can carry many women through the night; see Best Sleeping Position for Period Cramps.
- Mefenamic acid (Ponstel) is a prescription NSAID sometimes used for period pain and heavy periods; see Mefenamic Acid Side Effects.
Naproxen carries the same stomach, kidney and heart cautions as ibuprofen. Follow the dose and spacing on the label, choose whichever suits your day, and never take two NSAIDs together.
Who should avoid them, or ask first
Talk to your doctor or pharmacist before taking ibuprofen or naproxen if you:
- have had a stomach ulcer or stomach bleeding
- have kidney disease, heart disease or high blood pressure
- take blood thinners, steroids or other medicines regularly
- have asthma that is triggered by aspirin
- are pregnant or could be pregnant
Side effects to watch for
The most common side effects are stomach upset, heartburn and nausea, which taking the medicine with food helps prevent. Stop and seek urgent care for black or bloody stools, vomiting blood, or severe stomach pain.
If ibuprofen isn’t enough
If you take it early and correctly for two or three cycles and your cramps still keep you in bed, see a doctor. Severe cramps that don’t respond can come from endometriosis or adenomyosis, which have their own treatments. Hormonal options are another standard choice; see Birth Control for Period Cramps. Our guide to natural remedies for period cramps covers other options, including yoga, and for other kinds of pain, see when ibuprofen isn’t a good fit.
Ibuprofen eases the pain. Chinese medicine asks why it returns.
Ibuprofen eases cramps each month, which is why so many women reach for it every period. Chinese medicine asks why the cramps keep coming. Cramps that feel better with warmth, often with cold hands and feet or dark clots, are traditionally described as cold in the uterus, a pattern TCM addresses as a whole rather than month by month.
CycleCalm follows that tradition. It is a sealed herbal pouch worn over the navel as a 30-day course. Most women in my practice used a single course. One of them had painful periods for 20 years, severe enough to keep her in bed for up to three days each month. With her next period after one course, she reported no pain, brighter red blood and no dark clots. Hers is one selected case from my practice records, and cramps that severe deserve a doctor’s check first.
Reviewed October 2026. Author: Qingcai Wang, MD, PhD, developer of the Five Essences external herbal-pouch formulations, with a commercial interest in their sale. General education only; continue your medical care.
Sources: ACOG: dysmenorrhea; MedlinePlus: ibuprofen; MedlinePlus: naproxen.