What can i do to prevent nightmares from taking lopressor (metoprolol tartrate) beta blocker for my heart?

Coping wi/ nightmare: Ask doctor about alternative med. Nightmares arise from meds & other reasons. Develop management skills: learn relaxation, breathing, & visual imagery; practice daily & nightly. This will help heart, bp, mind, general well-being, reduce stress & incidence of nightmares. Use calming skills when nightmares occur & train your brain by rewriting nightmare to outcome you desire. Sweet dreams.