I've Had A Tough Time With Citrolopram This Time. I

I've had a tough time with citrolopram this time. I previously took it a few years ago for a short time for anxiety and depression and it worked great! Never made me drowsy. This time around the drowsiness is awful. I'm taking 5mg...10 cut in half as per Dr. I'm worried that taking it at night will cause insomnia. Is there a rough estimate as to how long after ingestion the drowsiness settles in for most?