One type of photochemical reaction is the dissociation of a molecule into two fragments. Since it is the electrons that provide the bonding forces that hold atoms together into molecules, if the distribution of electrons within a molecule changes drastically, the bonding forces may also change.
Trade names: IntropinÂ®, DopastatÂ®, RevimineÂ®. Mechanistic Class: sympathomimetic, dopaminergic and Î² 1 -adrenergic agonist. Therapeutic Class: vasopressor. Mechanism of action: Dopamine is a natural catecholamine neurotransmitter and is the biological precursor to norepinephrine.It increases heart rate, cardiac contractility and blood pressure by multiple mechanisms. Dopamine causes norepinephrine release from sympathetic nerve endings.echanism of action: Dopamine is a natural catecholamine neurotransmitter and is the biological precursor to norepinephrine. It increases heart rate, cardiac contractility and blood pressure by multiple mechanisms.
DRUG CLASS AND MECHANISM: Dopamine is a chemical produced by our body and it has several functions. Dopamine works as a neurotransmitter (chemical that nerves use to communicate) in the brain.It is also converted to norepinephrine, another neurotransmitter. Dopamine increases heart rate and heart muscle contractions.It also causes increases in blood pressure. The FDA approved dopamine in February 1974.opamine works as a neurotransmitter (chemical that nerves use to communicate) in the brain. It is also converted to norepinephrine, another neurotransmitter. Dopamine increases heart rate and heart muscle contractions. It also causes increases in blood pressure. The FDA approved dopamine in February 1974.