I have had problems sleeping for 6 weeks. Told the doctor. I don t smoke eat a, proper diet of fruits & veg . and meat. No stress at work, no money problems, etc. But I feel my heart banging at night , rapid. So the Doctor , put me on apo-metoprolol ,for 30 days ??? 2 weeks later I still sleep , only 2-3 hrs , some nights less ?????