I am new to the system to take this for what it worth but I don't see why something like that should break the game. (The GM can always limit its availability if nothing else.)
Right off the top of my head, it would turn lightsaber fights into a dice rolling marathon.
"I hit him with my saber!"
"He uses his parry to mitigate damage for strain. He hits you with a saber"
"I use my Parry to mitigate damage and hit him back."
"He uses his parry and then takes a Strain Stim, putting him back to full health."
And so on. Congrats, you've just broken Saber Combat.
I'm not disagreeing with you but I dont see allowing preparation and administration of an injectible drug while engaged in melee.