Both answers missed what the person was asking...
Depending on what you need the TB test for will depend on how long your initial TB clearance is good for...
For example: Employees of food and schools only need one tb test and it's valid indefinitely. However employees' in hospitals, care homes, nursing homes, and adult day care centers need to receive a TB test each year.
You will need to check with your doctor to see which one yours applies to since it is due to medication...
Depending on what you need the TB test for will depend on how long your initial TB clearance is good for...
For example: Employees of food and schools only need one tb test and it's valid indefinitely. However employees' in hospitals, care homes, nursing homes, and adult day care centers need to receive a TB test each year.
You will need to check with your doctor to see which one yours applies to since it is due to medication...