One of my pts had Roxenol ordered. I had never pulled it, and in doing so, I counted before pulling it, but instead of where it asked how many were taken (should have been 1) I thought it meant how much I was giving (5mg) so I put 5! But it looked like I took 50 mg instead of 5!! Ack! I explained it to the charge nurses at the end of the shift when they were counting (I didn't know it was an error until then). Ugh. Now I'm paranoid that I'm going to be watched :/ I made sure to pay attention the next shift (had the same pt) and pulled it 3 times for the pt but made sure to put 1 was taken!