From Dota 2 Wiki
| Healing Salve|
|A magical salve that can quickly mend even the deepest of wounds.|
- Stacks with itself in inventory, there is no stack limit. The sell-back price adapts based on the number of Salves in a stack.
- Healing Salves are not shareable, however, they can be cast on allies.
- Double clicking the item casts it on self.
- If the target is more than 500 range away, the caster moves to the target until it is within 250 range before casting.
- The owner does not have to face the target to use this on it.
- Successive casts on the same target do not stack, but refresh the duration instead.
- Restores health in the form of health regeneration, so it heals for 5 health in 0.1 second intervals, which is 50 health per second.
- Fully stacks with other health regeneration increasing effects.
- The Healing Salve's effect gets dispelled upon taking player-based damage, so do not use it in the middle of combat.
- In some situations however, it may be worth it to use it in combat. Even 1 second long of it healing can be enough to prevent deaths in some situations.
- Depending on the hero, in the early-game, one Salve can refill about 50%-100% of a hero's health. It spares the hero from having to move back to the team's fountain to heal back up, which can take a lot of time, or cost the player a Town Portal Scroll.
- Unlike Tangoes, Healing Salves are more suited for a defensive lane. If the lane carry tries to farm and takes some damage, he can fall back for a short time to quickly heal back up and continue farming.
- Prior to patch 6.54 in the original DotA, Healing Salve was known as "Flask of Sapphire Water". The name was likely changed to help visually differentiate it from Bottle.