I know where I work we usually draw and give our own injections unless we are working a code and then we trust each other enough to do that but only in emergency situations. As far as charting same thing goes there we do are own charting but in emergency situations we have someone do the charting and the nurse who is in charge of the patient usually rereads and then cosigns . But only in emergency situations does that happen,Because what if you would have to go to court and the medication you gave was wrong? they aren"t going to take into consideration that you gave something someone else drew up so from experience it would be best to draw up your own meds and give them unless of course it is an emergency and then you have to be able to trust your co workers enough that they would have your back.