Which term refers to the practice of a pharmacist substituting one drug for another, provided it is in the same drug class?

A young boy complains of pain in his fingers after spending several hours outside riding a sled in cold temperatures. After ensuring that he has no life-threatening conditions, you turn your attention to his hands and note that his fingers are cold to the touch. Which of the following signs or symptoms would help confirm your suspicion that he is suffering from early or superficial frostbite?

a. Soft but numb skin on the fingers b. A history of being exposed to cold temperatures c. Swelling of and blisters on the fingers d. Firm but numb cold skin on the fingers

Which of the following is not a potential symptom of chronic N2O abuse?

A) Vitamin D deficiency B) Neurologic disorders C) Megablastic anemia D) Reproductive difficulty