Mountain Dew MDX
Gone since about 2007. The end was never announced; retrospectives split between mid- and late-2007, and Vault, the rival it was built to fight, outlived it by four years.
Last verified Nov 7, 2026
Pepsi's 'energy soda' arrived in November 2005 carrying ginseng, guarana, taurine and a mission: beat Coca-Cola's Vault to the soda-energy hybrid crowd. Both are now in the ground.
Filed under: Drinks & Sodas · the ’00s & later
📅 Timeline
- 2005Announced October 19 and national November 1: Mountain Dew flavor plus a ginseng-guarana-taurine-d-ribose 'power pack.'
- 2006Coca-Cola's Vault launched nationally to fight it head-on; MDX dropped its 14-oz bottle for a standard 20-oz.
- 2007Trade press reported MDX up 271 percent in 2006 scan data that March — then Pepsi phased it out before the year ended; the exact month was never documented.
❓ People also ask
Why did Mountain Dew MDX fail?
Its sales base was tiny even when growth looked spectacular, and purpose-built energy drinks were taking the shelf. PepsiCo's annual report mentioned MDX exactly once, for fiscal 2005.
When exactly was MDX discontinued?
It was never announced. Retrospectives split between mid- and late-2007; trade data shows it alive and growing through 2006.
What was MDX up against?
Coca-Cola's Vault, the other 'energy soda,' launched months later and died in 2011 — the entire hybrid category is now a memorial exhibit.
🧾 Sources
- BevNET, Mountain Dew Kicks It Into High Gear With MDX (2005)
- Beverage Industry, The 2006 Soft Drinks Report (2006)
- Beverage Industry, Functional Demands Exceed Soft Drinks' Standard Form (2007)
- Mental Floss, 8 Discontinued Mountain Dew Flavors We Still Love (2024)