Swallowed Penny is an unlockable trinket in The Binding of Isaac.

Spawns 1 coin of any type after taking damage.

If held by Keeper or Tainted Keeper, spawns 0-1 coins instead.

Can be found by destroying urns, buckets, and special shopkeepers.

This page shows the latest information as of the new Repentance+ (Online Co-op) DLC.
To see information about this trinket for the previous Repentance version, check this page instead.

Complete challenge #15: Slow Roll.

Swallowed Penny can be found in the following item pools:

The following special synergies and interactions for Swallowed Penny have been documented.

* Note that not all possible synergies and interactions are listed here.

Below is the Internal Item Description as shown in-game.
Note that some stat changes are not displayed here. Please see the main description for the full effects.

Swallowed Penny

• Spawns a coin each time Isaac takes damage
• Golden Trinket (without Mom's Box): Spawns 2 coins each time Isaac takes damage
• Mom's Box: Spawns 2 coins each time Isaac takes damage
• Mom's Box + Golden Trinket: Spawns 3 coins each time Isaac takes damage

• Check out the trinket description on the external Isaac Wiki.