A provider gives the nurse a phone order for: Tylenol 1,000 milligrams by mouth every 6 hours as needed for pain. Which of the following is the correct documentation of this order?
1. Tylenol 1,000 milligrams IM q 6 hr p.r. pain
2. Tylenol 1,000 mg p.o. every 6 h prn pain
3. Tylenol 1,000 mL by mouth q 6 hours ad lib
4. Tylenol 1,000 mg p.r. every 6 hours per pain