If you’re on medication and you need to carry your medicines with your offshore, you have to report this before departure. For medicines could possibly influence your judgment or response capacity. Everybody who knows the risk of working in a processing environment, also knows that a quick and adequate response can be vital. Therefore, this rule has a clear and important reason: the safety of all on board.Guidelines for the Oil and Gas industry, Health Safety Environment.
How does it works.
Be aware that every country and company has its own and maybe other regulations.
Please ask them before you start the activities and that you understand them.
http://www.ktma.nl/uk/