Trust me, don't disclose anything. They can't ask for your past records. I've worked somewhere for 6 yrs and have lupus. Never a problem w old boss now they want me to undergo "fit for duty" exam...
Don't buy a book like others said, you will be too tired to read. Know your drugs inside and out and how they affect the heart (rate, rhythm, squeeze) and know which drips to hang for which...