Berserk syringe

The berserk syringe is a type of ammunition in Fallout 4.

Characteristics
The Berserk syringe is a small little syringe akin to that of a tranq dart. It is not actually considered ammunition; instead it is located under aid and has weight.

Effects
Chance to frenzy target for 2 minutes. A frenzied target will attack anyone nearby, forgetting allegiances.

However, there is a very strict maximum level for a target to be affected by a Berserk Syringe, otherwise you'll get a note saying that the target "is too powerful" to be affected. It is unclear what exactly this level maximum is and whether or not it is partially dependent on your own level, but it seems that even at high levels (40+) only enemies less than around level 20 can be affected.

Weapons using this ammunition

 * Syringer

Locations
Craftable at chemistry stations by the Sole Survivor