My Daughter Will Be 4 Years Old Next August. She

My daughter will be 4 years old next August. She has a cold with congestion, a cough, and a runny nose. I purchased children's Sudafed PE Cold+Cough. How many milligrams can I give her? I know it says for children 4 to 11, but her Pediatrician has given me a different milligram amount before when she was younger than recommended..
Thank you.