I took one liquid gel aleve (naproxen) at 3pm Monday, can I take 1 800mg ibuprofen now at 130am Tuesday?

Pain med dosing. No problem. Taking an ibuprofen now will be fine. Aleve (Naproxen) is usually dosed at 220 or 250 mg per pill without a prescription. The max safe daily dose of naproxen is 500 mg every 12 hours. The max safe dose for Ibuprofen is 800 mg every 8 hrs. In general, it is probably best if you stick with one or the other. Even tho it is not quite 12 hrs since the Aleve, it is fine to take ibu now.