Dear Bushkey,
Lopressor belongs to the family of drugs called beta-blockers.
These drugs work to lower the heart rate and blood pressure and are generally well tolerated. Potential side effects are slow heart rate, depression and erectile dysfunction. They should be used with caution in combination with calcium channel blockers.
Diovan belongs to a class of drugs called angiotensin receptor blockers and is similar to ACE inhibitors. They lower the effects of angiotension and are also generally well tolerated. The main side effects to watch for are cough, swelling and renal disturbances. They are safe to combine with beta-blockers.
Maxide is a diuretic and is safe to stop without a taper.