Naproxen tablets are available strengths of 250mg, 375mg and 500mg. The liquid has either 25mg or 50mg in 1ml.Acetaminophen and ibuprofen are brief-term remedies. And while naproxen is longer-lasting, it still can’t get you through a full working day. If you can’t shake your symptoms — or they get worse — quit taking the pills and head into