Not sure why you thought IPL was unsafe....

IPL, as well as Fraxel Restore and Titan are ALL safe after filler. In fact, there is likely some synergy of effects, giving better results than filler or laser alone. Studies have been performed to show the filler is not altered or diminished. I'd question the information of someone who told you IPL was unsafe. Perhaps the practice did not own an IPL, but did own a Titan. Titan will tighten the lax skin, but IPL dramatically improves the color and surface texture, which actually complements filler more than Titan in my opinion.