Steady

Steady is a consumable item in Fallout: New Vegas.

Background
Steady seems to be a parallel to diazepam, (which is just GENERIC for Valium) said to be used by snipers to steady their aim. The item appears to be a makeshift inhaler crafted from an empty bottle, complete with a tinfoil heating element and a hose mouthpiece.

Characteristics
Steady drastically increases the accuracy of the user's ranged attacks. While the chem is active, idle sway is eliminated. Furthermore, all VATS hit chances become 95%, or 76% if the user has the Fast Shot trait.

Like most other chems, using Steady risks the chance of addiction.