Overload

' Overload is so strong that it racks the body with spasms and burns the digestive tract, so be prepared for 50 damage in chunks of 10 when you drink it! You will regain these 50 Hitpoints when the stat effects wear off.

Overload gives you the stat effects and magic boosts of ALL five of its potion ingredients - extreme attack, extreme strength, extreme defence, extreme magic and extreme ranging - for a period of five minutes. Unlike the other extreme potions, which gradually return your stats to their normal level, overload will keep these bonuses at their boosted level for five minutes and will then reset them back to their original state (healing the 50 Hitpoints at the same time).'