Weakness, swelling, and pain are the most common myositis symptoms. Myositis causes include infection, injury, autoimmune conditions, and drug side effects. Plaquenil and cancer risk Does plaquenil cause weight loss or weight gain Chloroquine resistance prophylaxis Hydroxychloroquine plaquenil withdrawal symptoms The largest literature review on colchicine myopathy was conducted by Wilbur and Makowsky in 2004 where a database search found 75 cases. Most patients presented with proximal muscle weakness. A wide range of treatment durations were noted from 4 days to 11 yrs with cumulative daily doses of 1.4 ± 0.96 mg. Dermatomyositis is one of a group of rare muscle diseases called inflammatory myopathies, which are characterized by chronic muscle inflammation accompanied by muscle weakness. An identifying factor for dermatomyositis is a skin rash that precedes or accompanies progressive muscle weakness. Muscle weakness, when present, can develop over a period of days, weeks, or months. There can be loss of muscle bulk atrophy. The muscles of the shoulders, upper arms, hips, thighs and neck display the most weakness in dermatomyositis. There also can be joint pain, inflammation of the heart and lung muscle tissues, as well as inflammation of blood vessels to other organs. Myositis is caused by any condition that leads to inflammation in the muscles. Treatment of myositis varies according to the cause. Plaquenil for dermatomyositis muscle weakness Side Effects of Plaquenil Hydroxychloroquine, Warnings, Uses, Dermatomyositis Myositis Support and Understanding Chloroquine use and fluoroquinolone resistance dissertationChloroquine phosphate molecular weightHydroxychloroquine immune suppressant The muscle weakness and skin problems linked with dermatomyositis can cause a number of problems. Some common complications are skin ulcers; gastric ulcers; difficulty breathing; lung infections Dermatomyositis Causes, Symptoms, and Treatment. Diseases - Dermatomyositis - Top Level Muscular.. Dermatomyositis - Diagnosis and treatment - Mayo Clinic. A drug-induced, or toxic, myopathy is defined as the acute or subacute manifestation of myopathic symptoms such as muscle weakness, myalgia, creatine kinase elevation, or myoglobinuria that can occur in patients without muscle disease when they are exposed to certain drugs. Injury. Vigorous exercise can lead to muscle pain, swelling, and weakness for hours or days after a workout. Inflammation contributes to these symptoms, technically making this a form of myositis. Myositis symptoms after exercise or injury nearly always resolve completely with rest and recovery. Dermatomyositis DM is the easiest form of myositis to diagnose due to the purple-red rashes in the shape of the heliotrope flower. The rash develops on the eyelids, face, chest, neck, and back. It also develops over joints such as knuckles, elbows, knees and toes. Muscle weakness normally follows.