If you are not responding to lisnopril
and metoprolol is causing side effects then other
beta blockers can be tried or you can be given diltiazem or verapamil. Heart ECHO, holter, or stress ECHO etc should be done. You should also get your blood cholesterol, lipid, triglyceride, blood sugar and thyroid levels checked.
Please discuss this with your cardiologist. Take care!
The medical advice given should not be considered a substitute for medical care provided by a doctor who can examine you.