The nurse administers quinidine IV to control an arrhythmia for a patient with mitral valve prolapse. The nurse understands that which of the following is a common adverse reaction to the drug?


• Common adverse effects of quinidine include diarrhea, nausea, vomiting, cramping, and dizziness.

• Rare adverse effects include tinnitus, syncope, blurred vision, rash, thrombocytopenia, ataxia, and palpitations.

• Life-threatening complications may include agranulocytosis and torsades de pointes.

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