A 32-year-old man is admitted to the ED after taking an overdose of a tricyclic antidepressant drug. He's unconscious and breathing at a rate of 5 to 6 breaths/minute. His ABG values on room air are as follows: pH, 7.25
PaCO2, 61 mm Hg
PaO2, 74 mm Hg
HCO3-, 26 mEq/liter
SaO2, 89%
Determine the cause (s) of the acid-base disorder:
1. Disease, Disorder or Drug
2. (vital) Signs and Symptoms
3. CAUSE of abnormal CO2 OR HCO3 levels
4. Abnormal CO2 OR HCO3 levels
5. A/B Disorder

You are assessing an 86-year-old postoperative patient who has an unexpressive, stoic demeanor. when you enter the room, the patient is curled into the fetal position and your assessment reveals that his vital signs are elevated and he is diaphoretic. you ask the patient what his pain level is on a 0-to-10 scale that you explained to the patient prior to surgery. the patient indicates a pain level of “three or so.” you review your pain-management orders and find that all medications are ordered prn. how would you treat this patient's pain?