why not have canned rage?

Adrenaline Shot Item 1+

Consumable Magical Potion
Usage held in 1 hand; Bulk L
Activate [one-action] (manipulate)
Duration 1 minute

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A adrenaline shot is a brass needle full of extracted adrenaline. When you administer this shot, the target instantly enters a rage as a barbarian of the items level. When the rage ends, you are fatigued for one minute.

Adrenaline Shot (Minor)Item 1

SourcePlayer Core 2 pg. 304^1.1
Price 4 gp
Bulk L

Adrenaline Shot (Lesser)Item 3

Price 12 gp
Bulk L
The rage is of a level 3 barbarian.

Adrenaline Shot (Moderate)Item 6

Price 50 gp
Bulk L
The rage is of a level 6 barbarian.

Adrenaline Shot (Greater)Item 12

Price 400 gp
Bulk L
The rage is of a level 12 barbarian.

Adrenaline Shot (Major)Item 18

Price 5,000 gp
Bulk L
The rage is of a level 18 barbarian.