On My Profile under the Traveler section, you can enter your Medical information.
You'll click "Yes, I have a medical condition", and you'll be prompted with a section to describe the condition. Please provide us with as many details as possible.
It is recommended that you give us the most information possible, so that we can review it before the trip and prepare our crew members if necessary. If we have any concerns, you may get a call from one of our help desk agents for clarification on what we need to have prepared in case of an emergency.
Before you travel, be 100% sure that you have, and can travel with, all the medication / medical equipment you might need. Be sure to pack all medical items into your carry on bag, you never want to risk it being lost or destroyed in checked luggage.