A 65-year-old Caucasian woman presented with insidious onset of symmetric bilateral lower and upper limb weakness, which progressed slowly over the last 3 years. The pattern of weakness was mainly proximal, with some minimal to mild distal weakness evolving in recent months. She also developed some tingling and numbness in her toes followed by fingertips over the last year. Does plaquenil change heart rate Hydroxychloroquine and sulfasalazine Hair loss with plaquenil Cyst buster plaquenil Hydroxychloroquine HCQ is commonly prescribed for treatment of inflammatory arthritis. The most frequently observed serious side effect is retinal toxicity; however, case reports have described HCQ induced neuromyotoxicity. HCQ-induced myopathy may be more common than appreciated. It can cause severe myopathy and respiratory failure. Clinicians should have a high index of suspicion for HCQ toxicity in patients with proximal myopathy, neuropathy, and respiratory failure. Muscle biopsy should be considered as characteristic pathologic changes confirm the diagnosis. Chloroquine and hydroxychloroquine, commonly used for rheumatologic conditions, are rare yet very important causes of toxic myopathy with vacuolar changes on muscle biopsy. Chloroquine and hydroxychloroquine, commonly used for rheumatologic conditions, are rare yet very important causes of toxic myopathy with vacuolar changes on muscle biopsy. This was attributed to pericarditis based on workup at an outside facility. She unintentionally lost 20 pounds since the onset of weakness. Approximately 3 years ago, the patient had an episode of chest pain lasting several days. Hydroxychloroquine myopathy pathology Muscle Pathology Overview – Therapath Neuropathology, Hydroxychloroquine-Induced Toxic Myopathy Causing. Plaquenil lowers blood sugarPlaquenil and suicidal thoughts Hydroxychloroquine Plaquenil is considered a disease-modifying anti-rheumatic drug DMARD. It can decrease the pain and swelling of arthritis. It may prevent joint damage and reduce the risk of long-term disability. Hydroxychloroquine is in a class of medications that was first used to prevent and treat malaria. Hydroxychloroquine Plaquenil. Pearls & Oy-sters Hydroxychloroquine-induced toxic myopathy.. Pathology Outlines - Acid phosphatase. Myopathy, any skeletal muscle disorder that directly affects the muscle fibres and does not arise secondarily from disorders of the nervous system. Myopathies are marked by muscular degeneration and weakness and may have a genetic or nongenetic basis. Heritable myopathies include the muscular Hydroxychloroquine HCQ and chloroquine are used worldwide for malaria as well as connective and rheumatological disorders. They have been reported to be linked to myopathy in patients. We report four patients who were receiving HCQ as part of treatment for connective tissue disorder and who presented with myopathy. A woman with systemic lupus erythematosus developed severe myopathy after a septicemic episode, and her treatment before admission was hydroxychloroquine sulfate and prednisolone.