The nurse administers a medication to a client, and 30 minutes later the client tells the nurse that he/she is starting to itch. The nurse notes a red rash over the client's body. Which intervention should the nurse implement first?
1. Have the crash cart brought to the room.
2. Assess the client's apical pulse and blood pressure.
3. Notify the health-care provider immediately.
4. Prepare to administer diphenhydramine (Benadryl), an antihistamine.
