I AM TAKING METROPROLOL SUCC AND HAVING SLEEP PROBLEM AND SOMETIMES HALLUCINATIONS.  I TAKE IT AT 10
His had gone through your query. Metoprolol can not help in sleep problem. It is just controlled your anxiety. Melatonin is different molecule than metoprolol, and it is helpful for sleep problem. Holiday is very useful if you are having sleep onset insomnia. So you have multiple options but require detail psychological evaluation before taking any of these medicines. Sleep hygiene like fix sleep schedule and avoid daytime sleep are also helpful. Avoid alcohol/smoking/soft Chat Doctor. Treatment of psychological stress will helpful to restore good sleep. So consult Psychiatrist and get further assistance. Thank you. Get well soon.