Stimpack

A stimpack is an item that appears as a small white box with a. Picking one up will increase the player's health by 10% up to a maximum of 100%.

Stimpacks are not included in the items percentage displayed at the end of each level.

Appearance statistics
In the IWADs the stimpack is first encountered on these maps per skill level:

The IWADs contain the following numbers of stimpacks per skill level:

Other versions
In the Xbox 360 and BFG Edition versions of the IWADs, the cross graphic is replaced with a red-and-white pill. This is due to the red cross symbol being protected under a treaty which disallows use in commercial products.

In the Doom Classic port, the cross is green.