I suffered from terrible allergies while I was pregnant with my second daughter. I felt horrible for five months out of the pregnancy and believed I could not take any medication for relief. My doctor told me that Sudafed was an approved medication to take while I was pregnant and would help with the sinus issues I was having. I decided to only take one pill at night before going to bed. I was not able to sleep since my nose would immediately stuff up when I laid down. I was amazed at how well this medication worked. I could feel relief within thirty minutes and actually could sleep through the night. This medication really worked for twenty four hours for me. I felt much better during the day and could continue with normal daily activities. Effectiveness This product worked perfect for me when I was pregnant and had horrible allergy symptoms. I swear by this product! Immediacy I could feel relief very quickly.