Corticosteroid myopathy presents as weakness and wasting of the proximal limb and girdle muscles and is generally reversible following cessation of therapy.
Corticosteroids inhibit intestinal calcium absorption and increase urinary calcium excretion leading to bone resorption and bone loss. Bone loss of 3% over one year has been demonstrated with prednisolone 10 mg per day. Postmenopausal females are particularly at risk for loss of bone density. Sixteen percent of elderly patients treated with corticosteroids for 5 years may experience vertebral compression fractures. One author reported measurable bone loss over two years in women on concomitant therapy with prednisolone mg per day and tamoxifen. [ Ref ]
Use of corticosteroids may produce posterior subcapsular cataracts, glaucoma with possible damage to the optic nerves, and may enhance the establishment of secondary ocular infections due to bacteria, fungi, or viruses . The use of systemic corticosteroids is not recommended in the treatment of optic neuritis and may lead to an increase in the risk of new episodes. Corticosteroids should be used cautiously in patients with ocular herpes simplex because of corneal perforation. Corticosteroids should not be used in active ocular herpes simplex.
In addition to increasing your risk of osteoporosis, steroid medications can weaken your muscles. Staying as active as possible will help you to maintain strong muscles and bones. Weight-bearing activities such as walking, dancing, and running will help your muscles stay strong and healthy. Many people report that these activities make them feel better mentally as well. In fact, there are actually chemicals in your brain triggered by significant exercise (usually about 30 minutes per day) that help you to attain a “natural high.” Your doctor can help you to assess your personal condition and decide on an exercise routine that is best for you. However, you should never put yourself through more than reasonable discomfort when exercising.