Fission Definition: Fission is the splitting of an atomic nucleus into two or more lighter nuclei accompanied by energy release. The original heavy atom is termed the parent nucleus and the lighter nuclei are daughter nuclei. By Anne Marie Helmenstine, Ph.D.
Release time. The primary difference between metoprolol succinate and metoprolol tartrate is the length of time that the drugs stay in your bloodstream. Metoprolol succinate will stay in a person's bloodstream for 24 complete hours. This means that the medication is a once per day pill.
Metoprolol (available as Lopressor Â® and Toprol-XL Â®) is a prescription medication used for lowering high blood pressure (hypertension), relieving angina symptoms, and improving chances of survival after a heart attack. The drug may also be used  off-label  for other conditions, such as migraines or anxiety.