Mountain Dew is a soft drink manufactured and distributed by Pepsi Co. As of 2007, behind only Coke, Diet Coke and Pepsi, Mountain Dew was the 4th best-selling Carbonated Soft Drink (CSD) in the US. Mountain Dew Energy was introduced to the UK in May 2010 with a different formula than the US, where it is not categorised as an energy drink.

Mountain Dew Game Fuel, a citrus and raspberry flavour soft drink limited edition, then followed in September 2012 as part of a major partnership with Microsoft Xbox and the launch of their new game, Halo 4.

In February 2013 Mountain Dew Sugar Free launched as a low calorie alternative to Mountain Dew Energy

In June 2013, Mountain Dew launched Amp powered by Mountain Dew, which provides all of the energy expected of drinks in the stimulant market without compromising on taste.