Yes, you can take cough syrup for a dry cough during the first trimester of pregnancy. However, it is important to avoid oral decongestants for nasal congestion. Saline water-based preparations are recommended for nasal congestion. Dextromethorphan, found in products like Benylin, is safe to use for cough during pregnancy. For sore throat, you can safely use throat lozenges. In addition, you can take Tylenol as needed for pain relief. If you have any further questions or concerns, feel free to ask.