Go for Syringe

You snatch the syringe from the table and lunge at the stunned blonde woman, taking care to not make the same mistake she did. Before she can even react, you jab the needle into her leg, and inject the liquid. She kicks you with her foot. You fly backwards about 5 feet, landing on your back. The needle flies out of your hand, and lands in the corner of the room.

You wheeze. The superhuman kick knocked the air out of you. Alex clambers to her feet, **** in her eyes. You scramble backwards, but find your retreat unnecessary. Alex wobbles, then stumbles, and before you know it, she's face down on the floor, out cold.

Panting, you stagger to your feet. You don't know how long she'll be out, but you smirk as you look over her naked body. You wouldn't be able to become male again. After all, someone needed to operate the machine, and you doubted a male blueprint even existed. But at least Alex wouldn't control you. You had won.