When the back pain strikes, one of the fastest solutions is taking a couple pain reliever pills -- but is that over-the-counter medicine actually making things worse?

WASHINGTON – Pregnant women should avoid a group of common pain relievers including Advil and Aleve for the last four months of pregnancy, federal health officials said Thursday, expanding the warning from three months. They can lead to kidney problems in the fetus that can result in low levels of amniotic fluid that fills the womb. In one exception, the FDA said the new warning does not apply to low-dose aspirin when recommended by a doctor. Federal regulators said they decided to extend the warning after finding 35 cases of the amniotic fluid problem reported to the FDA and reviewing similar examples in published research. Use of the pain relievers reduced amniotic fluid in as little as two days, in some cases, the FDA said.