Heal Radiation overdose as field medic

I went with my buddy yesterday into an ASD facility and the mission brought us into the core.

It somehow happened that he got downed by radiation and I also noticed, I have a notification that I'm ticking.

I gave myself a yellow medpen and was fine again. The moment I revived my buddy he died instantly again. I took another yellow pen and right clicked on him, but it had no effect.

So I tractored him back to the lobby and dragged him into the medstation. It was a fun experience, but is there nothing else I can do?