It will be paid for by your employer.

The health test includes a drug test.

There are many ways they test for drug use such as hair, urine and blood tests. 

If you fail the drug test, you can be deported from Korea.

In March, the marjauna test has been dropped from the drug test but I would still advise against using it. Some teachers have still been tested for it even after it was removed from the test.

Drug laws are very strict in Korea.

If you are caught with drugs, you can end up in a lot of trouble.