A nurse is caring for a client who has been taking warfarin and has an international normalized ratio (INR) time of 5. Which of the following medications should the nurse anticipate the provider to prescribe?

(A) Blood pressure 160/94 mm Hg:
Metoprolol is a beta-blocker commonly used to treat hypertension. A blood pressure reading of 160/94 mm Hg indicates hypertension, which is an indication for administering metoprolol, not withholding it.

(B) Oxygen saturation 95%:
An oxygen saturation of 95% is within the normal range and does not provide a reason to withhold metoprolol. Oxygen saturation levels are not directly impacted by this medication in a way that would warrant withholding it.

(C) Heart rate 50/min:
A heart rate of 50/min is bradycardia (a slow heart rate). Metoprolol can further lower the heart rate, so it should be withheld if the client is already experiencing bradycardia. The nurse should notify the healthcare provider for further instructions.

(D) Respiratory rate 18/min:
A respiratory rate of 18/min is within the normal range (12-20 breaths per minute) and does not provide a reason to withhold metoprolol. Respiratory rate is not typically a contraindication for this medication unless there are specific respiratory conditions or other related symptoms present.

(A) Bradycardia: Bradycardia, or a slower than normal heart rate, is not typically associated with metabolic acidosis. Metabolic acidosis often leads to an increased heart rate (tachycardia) as the body tries to compensate for the acid-base imbalance.

(B) Hyperventilation: This is the most appropriate answer. Hyperventilation is a common response to metabolic acidosis. The body attempts to compensate for the high acid levels by increasing the rate and depth of breathing to expel more carbon dioxide (which is acidic) and raise the blood pH.

(C) Increased blood pressure: Metabolic acidosis does not typically cause an increase in blood pressure. In fact, severe acidosis can lead to vasodilation and a decrease in blood pressure.

(D) Cool, clammy skin: While cool, clammy skin can be a sign of shock or other serious conditions, it is not a typical manifestation of metabolic acidosis. However, in severe cases, metabolic acidosis can lead to shock, which might present with cool, clammy skin.