The Nurse Administers a Patient's Medication; Within 30 Minutes the Patient

The nurse administers a patient's medication; within 30 minutes the patient has bilateral wheezing and large red blotches on the face and is anxious and dizzy.What action by the nurse is best?

A) Encourage the patient to drink plenty of fluids.
B) Direct a colleague to contact the provider right away.
C) Retrieve an antihistamine from the medication supply.
D) Document potential patient allergy to medication.