check expiration date and condition of the medication
check the label
if no date can be found, examine the medication with suspicion
if you find discoloration, cloudiness, or particles in a liquid medication, do not use it
after the medication has been administered, reassess the patient to see if it worked
reassess the vital signs, esp. heart rate and blood pressure, at least every 5 minutes if the patient's condition changes
if the physician orders you to repeat the medication, it is important to do so at the right time