Please help with health recharge kits and stims

I just came back to the game after 10 years away. I set up my character, but my health and nano recharge kits don’t work. The stims don’t work either. I get a message saying to check my first aid being too low but they are not at all. I put them on my hotbar and neither right or left click work.

NVM I forgot I had to target myself first before using it. Man, it’s been a long time since I played.