An athlete is looking to improve their endurance with ephedrine. Which of the following substances will increase the effectiveness of ephedrine?

An athlete is looking to improve their endurance with ephedrine. Which of the following substances will increase the effectiveness of ephedrine?

An athlete is looking to improve their endurance with ephedrine. Which of the following substances will increase the effectiveness of ephedrine?


a. beta blockers

b. insulin

c. creatine

d. caffeine

e. androstenedione


Answer: d. caffeine


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