Thank you for your question. While it is safe to use the same needle in more than one area of the face, I would be surprised if a single syringe would be sufficient to produce satisfying results in both places. The other consideration is to ensure the filler used works equally well in the lips as it does the nose. I encourage you to schedule an assessment with an experienced, board-certified injector who can examine you in person and determine the best treatment plan for you.
Yes, the same syringe can be used on the same patient to treat different areas. Your injector will help you decide how much product is appropriate to get you the results you want.