Elderly??

At what age, specifically, is one considered to be 'elderly'??  I have many reasons for needing clarification on this! My doctor recently changed one of my medications.  The associated paperwork, supplied by the pharmacy, advises:  "CAUTION IS ADVISED WHEN USING THIS MEDICINE IN THE ELDERLY".

How old is elderly???  I have taken advantage of  "Senior Citizen" discounts at restaurants for several years now.  I've used my age to receive discounts at various retail outlets, and am not ashamed to do so. Gaining in years has many and sundry "perks".  My car insurance is now cheaper, and I often get additional discounts at hotels and car rental places. Not to mention those other 'specials' like Seniors Day at Disney World!  (although why anyone with bad knees; hips; difficulty in walking; poor vision; bad hearing; and shortness of breath upon exertion....would want to even VISIT an amusement park is beyond my comprehension!)  They certainly can't have much of a " turnout" on that day!

But at what age does one enter the "cautionary" years??  This is really a HUGE gaping hole of gray doubt and uncertainty!  Is this issue even addressed in the new Obama healthcare plan????

Is this information available through the Freedom Of Information Act (FOIA)? And just WHO makes the determination of the 'magic' age when one goes from being "over the hill" all the way to "elderly" ??  Was there a vote??  Did I miss it?? 

When I am inevitably heading in that direction.....I should at least have a say-so in WHEN that title of 'elderly' gets hung around my neck & entered into statistical databases!!