Yes, I also read that hydroxychloroquine may decrease the risk of developing type 2 diabetes. Hydroxychloroquine (Plaquenil) is an anti-inflammatory drug that has been used to treat rheumatoid arthritis and systemic lupus erythematosus for many years.
The studies showed that people who take Plaquenil for arthritis or lupus have lower rates of type 2 diabetes than people in the general population, who do not take the drug. However, antimalarials have been known to cause hypoglycemia as one of the side effects. Because of this, researchers started looking at what was involved in the drug that would cause blood glucose to drop when a person was taking it. Their researched found that antimalarials seemed to improve both insulin secretion and the body's sensitivity to insulin.
The researchers decided that, with additional studies, Plaquenil may prove to be a good supplemental medication (along with other diabetes medication) when the diabetes was not being controlled well with traditional drugs. And also, it is hoped that Plaquenil may one day be used to prevent type 2 diabetes, especially amongst people who are at a high risk for developing the disease. That would be great, wouldn't it?
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