Is metoprolol er the same as metoprolol tartrate?

Short answer: No. Metoprolol ER is not the same as metoprolol tartrate.

What the terms mean:
- Metoprolol tartrate: an immediate-release (IR) form. Usually taken more than once a day (e.g., twice daily). Traditionally used for high blood pressure, angina, certain heart rhythm problems.
- Metoprolol ER (extended-release): usually refers to metoprolol succinate, an extended-release form. Often taken once daily. Used for similar conditions but also specifically approved for heart failure (in many places) and after certain heart attacks.

Key points:
- They have different release profiles and salt forms (tartrate vs succinate).
- They are not interchangeable on a mg-for-mg basis. If a switch is needed, a clinician will adjust the dose and dosing schedule.
- If you’re seeing “metoprolol ER” on a prescription and you currently take tartrate, don’t substitute yourself—check with your prescriber or pharmacist.

If you want, tell me your current medication name (Tartrate vs Succinate/ER) and the dose, and I can help explain what that means or help you prepare questions for your pharmacist.