Oh really?
Nausea, vomiting, and diarrhea are the most common side effects of hydroxychloroquine (Plaquenil). Skin rashes are also possible.
Muscle weakness, changes in blood cell counts, and vision changes are rare side effects of hydroxychloroquine. These side effects are more likely to occur with long-term use and higher doses of the medication.
Low blood glucose and heart problems, like QT prolongation, can also occur while taking hydroxychloroquine. But these side effects aren’t common and are more likely to happen if there are other risk factors present.