Answer to Question 1
Ans: C
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Recurrence of seizure activity may result from abrupt discontinuation of the drug, even when the anticonvulsant is being administered in small daily doses. Abrupt discontinuation of the drug does not cause CNS depression, hypotension, or nystagmus. CNS depression, hypotension, and nystagmus are adverse reactions of phenytoin.
Answer to Question 2
Ans: B, C, E
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Signs of pancytopenia include sore throat, fever, general malaise, bleeding of the mucous membranes, epistaxis (bleeding from the nose), and easy bruising. Gingival hyperplasia and skin rash are examples of adverse reactions, but these are not associated with pancytopenia.