The table below lists adverse events can toprol be cut in the MERIT-HF study that occurred at an incidence of equal to or greater than in the Toprol-XL group and greater than placebo by more than. Symptoms of overdose may include unusually slow heartbeat, severe dizziness, slow or shallow breathing, weakness, or fainting. SafetyBase InterchangeSafetyBase Interchange is complete pharmacovigil. Available Strengths Toprol comes in number of strengths, including: Toprol 25 mg Toprol 50 mg Toprol 100 mg Toprol 200 mg. This means that it mostly blocks beta-1 receptors, especially at normal doses. Continue using this medicine as directed, even if you feel well. Called the doctor and find out the exact dosage that he prescribed, but could only talk to nurse who told me what my original dosage was.