Mountain Dew MDX
Mountain Dew MDX Logo
Mountain Dew MDX's Logo.
Flavor: Citrus
Color: Yellow-Green      
Current Status: Discontinued
Locations Available: United States
Year(s) Available: 2005 - 2007
Related Flavors: Sport, Dew FuelAmp, Energy, Energized, Adrenaline, Mountain Dew AMP, Kickstart (Limeade), Game Fuel (Lemonade), Distortion, Lemon, Lime, Kickstart (Original Dew), Kickstart Ultra (Original Dew), Amp Game Fuel Charged (Original Dew)
Related Promotions: N/A

Mountain Dew MDX was a Mountain Dew energy drink variant that lasted from 2005 and until 2007. It was PepsiCo's attempt to compete with Coca-Cola's Vault energy drink.


MDX is the original Mountain Dew flavor formula, but with ingredients added such as maltodextrin, ginseng, taurine, d-ribose, and guarana to give it the energy drink kick. It also had a higher caffeine content than original Mountain Dew, despite having the same basic taste and color as it.


  • Mountain Dew MDX was originally called Mountain Dew X. It was most likely the prototype name of MDX.
  • This is only one of many attempts at a Mountain Dew energy drink. See "Related Flavors" in the infobox for more.
  • Mountain Dew Ice, and MDX has a similar bottle design used, which were shaped much different than the regular dome-like bottles, and had grooves towards the bottom for holding. These Dome bottles are also used in other Pepsi products.