As indicated it is better to avoid medications to promote sleep, as the symptoms are likely to bounce back once you discontinue the medication. Besides hypnotic medications
like rozerem are best taken under the guidance of a specialist. However, there is no known interaction between rozerem and sertraline. You could try and adopt good sleep hygiene measures like going to bed at the same time, waking up at the same time, avoidance of alcohol, smoking and caffeinated beverages.