How much toprol (metoprolol) XL is an overdose of it?

Toprol (metoprolol) dose. Maximum dose is 200 mg/day. The dose must be adjusted based on heart rate (pulse) and blood pressure for each person. Usual goal is a pulse of 60 with a BP of 120/80. A well tolerated dose by one person may be an "overdose" in another person if it causes the pulse or blood pressure to fall too low.