Which of the following is NOT a common side effect of epinephrine?

The correct choice identifies drowsiness as not being a common side effect of epinephrine. Epinephrine, a medication used in emergency situations such as anaphylaxis or cardiac arrest, is a stimulant that activates the sympathetic nervous system. It typically leads to increased alertness and energy levels rather than drowsiness.

Common side effects of epinephrine include tachycardia, which is an increased heart rate due to its action on adrenergic receptors, and headaches, which can arise from elevated blood pressure and increased cerebral perfusion. Dizziness can also occur as a result of rapid changes in blood pressure or as a response to heightened physiological arousal. In contrast, drowsiness would counteract the stimulating effects of epinephrine and therefore is not a commonly reported side effect associated with its use.