Mountain Dew Wiki
Mountain Dew Wiki
Mountain Dew MDX
Mountain Dew MDX's 20 oz. bottle design.
Flavor: Citrus
Color: Yellow-Green      
Current Status: Discontinued
Locations Available: United States
Year(s) Available: 2005 - 2007
Related Flavors: Adrenaline
Mountain Dew AMP
Kickstart (Energizing Limeade)
Dew Fuel
Amp Energy
Mountain Dew Citrus Blast
Game Fuel (Lemonade)
Kickstart (Energizing Original Dew)
Kickstart Ultra (Energizing Original Dew)
Amp Game Fuel Charged (Original Dew)
Electric Charge Freeze
Spiked (Lemonade)
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 was 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.


  • Mountain Dew MDX was originally called Mountain Dew X. It was most likely to be the prototype name of MDX.
  • This was one of many attempts at a Mountain Dew energy drink. See "Related Flavors" in the infobox for more.
  • MDX was the pioneering flavor for the Sidekick bottle design, which PepsiCo would incorporate into most of their 20 oz. bottle designs later on in the 2010s, replacing the dome-like design.