Why get tested?
To find out if you are likely to have temporary paralysis after being given a muscle relaxant called suxamethonium during surgery. This temporary paralysis is called suxamethonium apnoea.

Cholinesterase can also be used to screen for exposure to the effects of organic phosphorus insecticides.

When to get tested?
If you or a close relative have experienced suxamethonium apnoea after a surgical operation.

To indicate possible insecticide poisoning with recent or frequent use of organic phosphorus insecticides. Occupational exposure can occur in workers involved with agriculture or the organic chemical industry.

Sample required?
A blood sample taken from a vein in your arm