If you absolutely have to have your caffeine fix to start your day, maybe you've wondered if there was a cheaper way to do it. You've already cut out the ever-popular "Starbucks Latte factor," now you're wondering if chewing coffee grinds may be able to squeeze out a little extra cash at the end of the month while still giving you that rush. (See also: How to Save $1,500 on Coffee)

I know it sounds like I'm pushing the last legalized drug in the U.S., but you're going to drink it anyway. At least I can help you hang on to some of that dwindling retirement fund while you search the classifieds for the next job. (Man, that sounded depressing.) So without further ado, the list of cheapest, I mean, "least expensive" ways to get your caffeine intake.

Please be aware, medications are NOT to be taken more than the prescribed dosage on the package. Overdoses of acetaminophen are extremely harmful to your liver and can be fatal. Getting your caffeine from medications is not recommended.

1. No Doz

This is the secret that cross-country truckers have known about for years. No Doz packs a punch that will keep you going...and going...and going...And at only $0.0008 per milligram of caffeine, you can save some of those extra pennies for the ER room after you've had an anxiety attack.

2. Tetley's Black Tea

This British favorite is priced so low, they have it twice a day. What made Churchill so staunchly great? It's the tea, dear. At less than a dime a tea bag, it brings the caffeine cost at $0.0011 per milligram. That's so low, it's practically free. God save the queen...and your cash.

3. Excedrin Extra Strength

Got a migraine and a midterm? Look no further than Excedrin Extra Strength. At $0.0015 per milligram, you can stay awake, lose the headache and afford to keep your accountant.

Here's the list in full, from least expensive to most expensive These are based on prices that are not on sale, and of course can vary from region to region.

How Much Caffeine Costs

No Doz ($0.0008 per mg) Tetley's Black Tea ($0.0011 per mg) Excedrin Extra Strength ($0.0015 per mg) Starbucks Grande Coffee ($0.0056 per mg) Starbucks Grande Iced Coffee (w/o Ice) ($0.0059 per mg) Mountain Dew ($0.0090 cents per mg) Starbucks Grande Iced Coffee (w/ Ice) ($0.0097 per mg) Diet Coke/Tab (Tie) ($0.0104 per mg) Dr. Pepper ($0.0111 per mg Midol Maximum Strength ($0.0113 per mg) Sunkist Orange Soda ($0.0116 per mg) Pepsi ($0.0129 per mg) Starbucks Double Espresso ($0.013 per mg) Coke ($0.0140 per mg) Monster Energy Drink ($0.0149 per mg) Full Throttle Energy Drink ($0.0159 per mg) A & W Cream Soda ($0.0169 per mg) Starbucks Grande Latte/Single Espresso (Tie) $0.0200 per mg) Barq's Rootbeer ($0.0213 per mg) Starbucks Grande Tazo Chai Tea Latte ($0.0355 per mg) Rockstar Energy Drink ($0.0374 per mg) Snapple Iced Tea ($0.07 per mg)

Starbucks double brews their iced coffee, so you get double the caffeine if you tell them to hold the ice. See How Much Caffeine Is In That? to get caffeine content in your favorite drinks, food, and medicines. Remember, ingest caffeine responsibly. Although I only measured energy drinks for caffeine, some of them have other, more exotic ingredients to give you a boost. Although No Doz is the cheapest, I'll stay away from the stuff. The last time I took it, I was a college freshman, working full time and studying for exams. I don't remember everything that happened that week, but I ended up babbling incoherently about Socrates, Australopithecus, and Rothko at a local Starbucks. Hey, at least I got a great G.P.A.!