Yes, it is generally safe to use nasal sprays like Otrivin during pregnancy. However, it is important not to use it for more than 3 to 5 days in a row as it could worsen congestion. It is also recommended to try nasal hygiene with a saline solution, which can help reduce congestion and prevent mucus from draining into the throat and causing coughing. This can be done as often as needed throughout the day, and at least 30 minutes before bedtime.