Sunday, January 1, 2017


Hello awesomites ! Today I am gonna talk about a drug named as "Metoclopramide".
Basically it's a anti-emetic drug.First let us know what is emesis !.In simple words emesis means vomiting.Chemoreceptor trigger zone (CTZ) is  located in area postrema and the nucleus tractus solitarius (NTS) of medulla oblongata.They both act as a important relay areas for afferent impulses arising in g.i.t.,throat and other viscera.
Metoclopramide is a Pro kinetic drug
It acts on GIT causing increase in peristaltic movement with relaxation of  pylorus .

Mechanism of action includes :

a)D2 antagonism:It Decreases dopamine concentration  and obviously acetylcholine concentration increases  !.Which causes activation of ACh receptors leading to increase in LES tone and gastric pressure .

b)5-HT4 agonism:Activates 5-HT4 receptors on primary afferent neurons (PAN) of the ENS,via excitatory interneurons.

Gastric hurrying and LES tonic effects are mainly due to this action which is synergised by bethanechol and attenuated by atropine .

c)5-HT3 antagonism: At high concentrations  it can block 5-HT3 receptors present on inhibitory myenteric interneurons and in NTS/CTZ .Increase in ACh concentration is also seen in minor condition

Long term use can cause parkinsonism-since decrease in dopamine , galactorrhea and gynecomastia .

It hastens use of many drugs like aspirin and diazepam by its action

~Jaskunwar Singh & Ojas 

No comments:

Post a Comment

This is express yourself space. Where you type create something beautiful! <3
Wondering what do I write? Well...
Tell us something you know better. You are a brilliant mind. Yes, you are! ^__^
Ask about something you don't understand @_@?
Compliment... Say something nice! =D
Be a good critic and correct us if something went wrong :|
Go ahead. Comment all you like here! (:

PS: We have moderated comments to reduce spam. ALL comments that are not spam will be published on the website.