Is phenergan (promethazine) cough syrup safe for 1 month old baby, because she is giving us sleepless nites?

No: Phenergan (promethazine) should not be given to a child younger than 2 years old. Phenergan (promethazine) can cause severe breathing problems or death in a child younger than 2. Carefully follow your doctor's instructions when giving this medicine to a child of any age.

Do not use: Unfortunately the Phenergan (promethazine) has been linked to apnea (not breathing) as a complication under the age of 2 yrs. I would never use it or any other cough syrup for a 1mo. A saline nose wash is the only recommended treatment at that age.