What can I use to help severe menstrual cramping? Normal pain relievers like Advil and Aleve (naproxen) don't work for me.

Agree w Dr. Lewis. NSAID’s, SSRI’s, hormone meds, OTC meds containing diuretics, warm bath, heating pad, exercise & acupuncture are excellent for PMS / period. Avoid caffeine, chocolate, alcohol & salt. Get GYN eval to R/O underlying pathology. Consider omega- 3 fatty acids, magnesium (supplementation or through diet) or Black Cohosh with dr ok. Sipping Chamomile can dissipate pain. Ginger helps w nausea.
See answer. One should use non-pharmacological measures as an adjunct to any otc and prescription drugs to maximize chance of relief: use a heating pad; drink warm beverages; massage lower abdomen; eat frequent light meals; avoid sugar, alcohol and caffeine, etc. Starting Ibuprofen 400-600 mg 3x/day several days before period onset maximizes its efficacy. Stronger pain meds, anti-depressants, bcps may help.