I have a central line, what can I inject to CTB?

[Anarcholoser]

Currently have a PICC / central line going from my arm to my heart. What can I inject to CTB as quickly and peacefully as possible? I have 10ml syringes.

 

[assistedsuicidelove]

Your so lucky

 

[Anarcholoser]

I'd feel luckier if I could think of something to inject into it that would be guaranteed to kill me. I thought air would work but it seems the amount of air required would be more likely to blow a vein than kill me?