Pax syringe

Pax syringe is an ammunition type in Fallout 4.

Characteristics
The Pax syringe is a small little syringe akin to that of a tranq dart. The Pax syringe is not actually considered ammunition instead it is located under aid and has weight (Albietly a very low amount of weight).

The syringe has a chance to make the target non-hostile for 30 seconds. While it says "chance", this appears to always work.

The state of non-hostility is terminated by acts of aggression against the target. For example, if the target is damaged by the Sole Survivor or a Companion, the target resumes its hostile state.

In addition to the benefits of having one less enemy, albeit temporarily, non-hostility means the enemy won't be trying to search for you if stealthed, and they can be pickpocketed (useful for e.g. stealing the fusion core out of an enemy in power armor, forcing them to exit).

Weapons using this ammunition

 * Syringer

Locations

 * Crafted by the Sole Survivor.
 * One can be found in Sandy Coves Convalescent Home.

Behind the senes
Pax is in Latin for peace, it also refers to Pax the Roman goddess of peace.