The Syringe is an item used by Lost Doctor Zombies in the Chinese version of Plants vs. Zombies 2. The Lost Doctor Zombie uses it to throw at the plants, which slows them down for five seconds. When this happens, the targeted plant will turn a shade of light blue. Lost Doctor Zombie can also inject himself with the syringe, making him become stronger for a while. The syringe's slowing effect can be nullified on a plant via Plant Food.