Common item (white). What the game says, what it really does, what each copy adds and what it pairs with.

Medkit
Common item (white)
Two seconds after taking a hit, you heal 20 plus 5% of your health. Each extra medkit heals another 5%.
Game text: «2 seconds after getting hurt, heal for 20 plus an additional 5% (+5% per stack) of maximum health.»
Stacking: Each copy adds the same, no cap.
Watch out: If you get hit again within 2 seconds, the wait starts over: weak if you are hit constantly.
| 1 copy | 2 copies | 3 copies | 5 copies | 10 copies |
|---|---|---|---|---|
| +5% | +10% | +15% | +25% | +50% |
Each copy adds the same.
the health he spends on skills triggers it at will.
heals double.
Two seconds after taking a hit, you heal 20 plus 5% of your health. Each extra medkit heals another 5%.
Stacking: Each copy adds the same, no cap.Watch out: If you get hit again within 2 seconds, the wait starts over: weak if you are hit constantly.
Sources: the game's English text (name and description), the Risk of Rain 2 wiki (riskofrain2.wiki.gg: this item's page, read on 31 October 2026; numbers, stacking formula and notes) and the wiki's survivor pages. The plain-words text and the synergies are ours. Icons: Risk of Rain 2 (Hopoo Games / Gearbox).