Given By: Gregory Bidwell.
The stamina potion increases your stamina. It resets your stamina to 0, and causes your stamina gauge to increase much more slowly when you're engaging in activity such as running around or swinging a weapon. Your stamina will still balance out at 50% if you keep walking, however. It lasts for 6 minutes. You can only use it once, so it would be better if you save it, and only pick it up when you're ready for the game's final battle.