Common side effects of hydroxychloroquine include headaches, nausea, vomiting, stomach pain, diarrhea, dizziness, muscle pain, rash, itching, and changes in skin color. Additionally, there have been reports of some serious side effects including changes in vision, difficulty breathing, chest pain, heart palpitations, and trouble sleeping. If any of these symptoms appear after taking hydroxychloroquine, it is important to seek medical attention right away.
