Mega Demondrug is a craftable consumable item in Monster Hunter World (MHW).
Upon consumption, this item increases the hunter's raw attack power by 7. This attack buff has no fixed duration and lasts until death/fainting or upon leaving the hunting area. It stacks with other attack buffs such as the Canteen's Attack Power Up, Demon Powder and Might Seed/Pill. However, Mega Demondrug's effect does not stack with Demondrug. Consuming a Mega Demondrug while Demondrug is active will override the normal Demondrug's effect.
How to get Mega Demondrug