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)
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.