Substance that blocks the neurotransmitter Acetylcholine in the central and peripheral nervous system. Example: Anticholinergic=dicycloverine : Atropine
Anticholinergics "How does it work
Anticholinergics are a class of medication that inhibit parasympathetic nerve impulses by selectively blocking the binding of the neurotransmitter acetylcholine to its receptor sight in nerve cells. The nerve fibers of the parasympathetic system are responsible for the involuntary movements of the smooth muscles in the GI Track, Urinary Tract and Lungs. Three Categories = antimuscarinic - ganglionic blockers - neuromuscular blockers.
Antihistamines "How do they work"
When you are exposed to an allergen -- like ragweed pollen -- it triggers your immune system to go into action. Immune system cells known as "mast cells" release a substance called histamine, which attaches to receptors in blood vessels causing them to enlarge. Histamine also binds to other receptors causing redness, swelling, itching, and changes in secretions. By blocking histamine receptors, antihistamines prevent these symptoms.
Dopaminergics "What are they"
Dopaminergic means related to the neurotransmitter dopamine. For example, certain proteins such as the dopamine transporter (DAT), vesicular monamine transport and dopamine receptors can be classified as dopaminergic, and neurons which synthesize or contain dopamine and synapses with dopamine receptors in them may also be labeled as dopaminergic.