Answer to Question 1
C
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Serious liver, bone marrow, and potentially serious dermatological adverse effects can occur with phenytoin. Drowsiness, fatigue, and lethargy are adverse effects of hydantoins and classified as not serious.
Answer to Question 2
B
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Symptoms of blood dyscrasias include fever, chills, sore throat, weakness, back pain, dark urine, decreased hematocrit (anemia), low platelet count (thrombocytopenia), low white blood cell count (leukopenia), and a reduction of all cellular elements of the complete blood count (pancytopenia). Dermatologic reactions would be reflected in skin alterations, electrolyte imbalances would result in differing symptoms depending on the electrolyte involved but would not cause chills and fever, and a superinfection could cause a fever but would not cause a sore throat, weakness, or back pain unless the infection involved those body parts.