Cholinesterase (pseudo)

This is an important test used to help detect and monitor exposure to organophosphorus insecticides.

Venous blood
1 tests included
5 days turnaround



About Cholinesterase (pseudo)

What is cholinesterase?

Cholinesterase is an enzyme which breaks down choline esters. There are two types of cholinesterases which can be divided based on the type of choline ester they break down. Pseudocholinesterase, or butrylcholinesterase, is found in the blood plasma (the liquid component of blood), liver, muscle and white matter of the brain, whereas acetylcholinesterase is found in red blood cells (RBCs), the lungs and the grey matter of the brain.

The level of these enzymes and their activity is reduced with exposure to insecticides. The level of pseudocholinesterase is also abnormal in pseudocholinesterase deficiency, an inherited condition in which people are not able to break down succinylcholine or mivacurium as quickly as normal.

Why take the test?

This test measures the level of pseudocholinesterase in the blood and can be used to help detect and monitor exposure to organophosphorus insecticides. Additionally, patients with pseudocholinesterase deficiency typically show low levels of the enzyme.


What's tested

Occupational Health

How it works



Purchase your Kit

Just order a test online and get your kit delivered right to your door unless you are ordering a COVID-19 Fit to Fly test where you will be given appointment options to attend our clinics across the United Kingdom for a nose and throat swab PCR test at the checkout stage.



Take your test and post

Follow our simple instructions to take your sample and post back the enclosed prepaid envelope to our accredited lab for processing. We also offer home or workplace visits by a qualified nurse. For COVID-19 Fit to Fly tests you must attend one of our partner clinics for our trained collection officers to take your sample. You will then have the results emailed to you.



Get results directly to your dashboard

You will receive an email notification from our medical team when your results are available on your secure personalised health dashboard.