Key takeaways
Metoprolol succinate (Toprol XL) and metoprolol tartrate (Lopressor) are both beta blockers used to treat high blood pressure and chest pain (angina). However, they have some important differences. Metoprolol succinate (Toprol XL) is an extended-release medication taken once daily and is also approved to lower the risk of hospitalization and death in people with heart failure. In contrast, metoprolol tartrate (Lopressor) is a short-acting medication taken twice daily and is approved to lower the risk of death after a heart attack. Both medications can cause side effects like tiredness, dizziness, and diarrhea. Also, both medications can hide symptoms of low blood sugar, so you should be aware of that if you have diabetes. Both medications are available as a lower-cost generic.
