Final answer:
The side effects of Plaquenil (hydroxychloroquine) may include nausea and vomiting, headache, dizziness, and rash.
Step-by-step explanation:
The side effects of Plaquenil (hydroxychloroquine) may include nausea and vomiting, headache, dizziness, and rash. Other potential side effects include fatigue, constipation, fever, chills, myalgia, jaundice, mucosal hemorrhaging, seizures, and shock. It is important to note that these side effects can vary in severity and may not occur in every individual.