Is it safe to use nasal spray while pregnant?

Yes with caution: No evidence of significant risk to baby if used as directed. Nasal spray decongestants are very habit forming. A phenomenon called the rebound effect causes the blood vessels that shrink with use to rebound larger with more congestion and they do it in shorter and shorter time periods. If you must use it use it only 1 or 2 times a day and never for more than 3 days in a row.