Potion of curing
|A blessed fluid which heals some wounds, clears the mind, and cures diseases. If it is used when one is at or near full health, it can also slightly repair permanent injuries.|
If your maximum hit points have been reduced by rotting, quaffing a potion of curing at full or near full health will unrot them by a few points.
You feel better.
These are best saved for times when you need to cure a negative status effect, preferring potions or wands of heal wounds for restoring HP. However, if you should find yourself without any other healing or escape option (most commonly early in the game), these can be useful for restoring HP in a pinch. Just don't be surprised if whatever monster you're facing takes off most of the healed HP with its next attack.
If you plan to do extended, especially Tombs, there are multiple sources of rotting, so it is handy to have a stock of potion of curing ready to cure it.
Prior to 0.10, this item was known as a potion of healing.