This thread was intriguing enough that I decided to do a search on it......
I was surprised at how many OTC meds contain caffine.


Here are a few sites I thought were good, there are tons more......

For a list of foods and meds containing caffeine:

http://www.webmd.com/migraines-head...iggers-caffeine


What is the best way to stop caffeinated foods and beverages?

It's important to decrease your caffeine intake gradually because abruptly stopping it increases your risk of caffeine withdrawal headache. We recommend that patients at The New England Center for Headache begin by eliminating one portion of caffeine from the daily total and stay at that level for a 5 to 7 days. For example, if you drink 5 cups of coffee per day decrease one cup every 5 days, eliminating another cup the following week, and so on, until you have stopped drinking caffeinated beverages and eating foods that contain caffeine.
Remember to include the caffeine content of medications when you total your daily caffeine intake.
http://www.headachenech.com/faq/default.asp#18

The most frequent symptom associated with caffeine withdrawal is moderate to severe headache. This can occur between 12 and 24 hours after last intake of caffeine. It usually lasts for one to two days, though some may have a headache for longer. If you are purposefully attempting to stop consuming caffeine, be certain to check labels on pain medications. Some medications combine caffeine with acetaminophen and aspirin, since caffeine is an effective pain reliever.
http://www.wisegeek.com/what-are-sy...-withdrawal.htm


Good luck to you!! :)