Yes, Personal Medicine Profile analysis must be carried out only once - it is a one-time investment.
The test result does not have to be repeated as it is the case for e.g., blood samples for medical conditions.
Your report (result) is automatically updated with new medicine as soon as the international scientific evidence of the relation between gene variation and the medicine’s metabolism is established. This means that the hospital department / the doctor/ the patient/ the pharmacy will be able to use the on-line test result again and again  when you are re-admitted to the Healthcare sector.