Yes you can prevent hangovers with an iPhone! If you own an iPhone then this is something you have got to check out.
Features For Drink Tracker:
Blood Alcohol Content calculated and displayed in real time, even when the application is turned off. No manual refreshing or re-inputting required.
Supports Imperial, US and Metric measurement systems.
Unlike some other apps, the BAC calculations in DrinkTracker take into account the age, height, weight and gender of the user. Don’t be fooled - an accurate calculation cannot be made without all 4 of these data items.
Store and retain editable profiles (age, height, weight, gender) for multiple drinkers.
A target BAC can also be set for each profile, with a countdown timer showing how long before the target BAC is reached. BAC display is colour coded to show when BAC target has been reached.
Don’t get stuck with a fixed list of what someone else thinks you should be drinking - add your own favourite drinks to “My Drinks” for fast and easy selection later on. All drink details are fully editable at any time. Manually sort your drink list into the order you want.
Add drinks to the current session now or at a previous time. You can also remove drinks after they’ve been added if you make a mistake.
Full report on current drinking session including duration, details of drinks consumed and time left to reach target BAC.
Find your way home with Google Maps, search for a taxi near your current location, or access your contacts to email, text or phone someone to come and pick you up.
Here is the site if you want to read the article:
http://www.slappme.com/
Now when you drink, you can prevent hangovers with your iPhone. Amazing what technology can do!
Yes you can 
