What to take for a sinus infection--sudafed?

Yes: Decongestants can be helpful, but rinsing the nose with salt water can be even more helpful. There are low-volume sprays available in the drug store such as ocean spray or simply saline. High- volume rinsing with a neilmed bottle or neti pot are often even better. You need to see your physician if your symptoms lasts more than two weeks or you develop fever or facial headaches.