Prophylactic treatments for dermatology patients on systemic corticosteroids

Author: Lauren Smith, Medical Student, University of Otago Christchurch, Christchurch, and Dr Adrian Sykes, Dermatology Registrar, Waikato Hospital, Hamilton, New Zealand. DermNet New Zealand Editor in Chief: Hon A/Prof Amanda Oakley, Dermatologist, Hamilton, New Zealand. Copy edited by Maria McGivern. July 2017.

What are systemic corticosteroids?

Systemic corticosteroids (or ‘steroids’) are drugs derived from cortisol, a natural steroid produced by the adrenal gland in the body. Systemic steroids are prescribed in dermatology, most commonly for inflammatory skin diseases, such as:

Risks from long-term systemic corticosteroid use

There are risks from the long-term effects of treatment with systemic steroids, including infections (bacterial, fungal and viral), hypertension, diabetes, osteoporosis, avascular necrosis, myopathy, and glaucoma.

There are several ways some of these risk factors can be reduced, including through continual assessment and monitoring, lifestyle changes, and prophylactic treatments.

The risks detailed below refer to patients treated with > 7.5 mg/day of prednisone (or equivalent doses of other corticosteroids) for periods of time greater than 3 months. Below these levels the risk of health effects is negligible.

Effects on bone health

Systemic steroids stimulate bone resorption (breakdown) and reduce bone formation within the first few months of initiating treatment, which increases risk of osteoporosis and fracture [1,2].

Assessments

An assessment of bone mineral density (BMD) at the lumbar spine and/or the hip should be taken at the initiation of systemic steroids.

Consider a falls assessment for those individuals at increased risk of falls.

Blood tests are not usually necessary, but you could assess:

Lifestyle advice

The risk of developing osteoporosis can be reduced through the implementation of lifestyle changes. These include:

Prevention of osteoporosis

The prevention of osteoporosis is controversial. A bisphosphonate (eg, alendronic acid, risedronate sodium, or zoledronic acid) is first-line therapy if BMD-measured T-score is < −1 (ie, showing osteopenia or low bone mass) [4,5]. Osteoporosis is a T-score of < −2.5.

Bisphosphonates are also recommended for patients taking ≥ 7.5 mg/day of prednisone (or equivalent) for ≥ 3 months’ duration if they are in the following categories [4,5]:

Other options for osteoporosis

Prevention of osteoporosis in children

There are currently no evidence-based guidelines for the prevention and treatment of steroid-induced osteoporosis in children. Currently experts recommend [4]:

Cardiovascular disease

The use of systemic steroids is associated with hypertension, hyperglycaemia and obesity, which are risk factors for ischaemic heart disease and heart failure.

Assessments

Assess the patient’s current risk factors for cardiovascular disease (CVD); this will include assessing:

Lifestyle advice

The risk of the patient developing CVD can be reduced through the following lifestyle factors:

Prevention of cardiovascular disease

Calculate the patient’s cardiovascular risk. If the outcome of your calculations presents their risk as:

Low: promote lifestyle changes

Moderate: discuss the benefits and harms of blood pressure and/or lipid-lowering drugs, and lifestyle changes

High: discuss with these patients how they are likely to benefit from blood pressure and lipid-lowering medications, as well as antiplatelet drugs, and intensive lifestyle interventions. Prescriptions may include:

Aim for the following targets with patients at high risk of CVD:

Assess the patient’s lipid profile at baseline, after 1 month, and then every 6–12 months after the initiation of systemic steroids. The Framingham Risk Score can be used to assess an individual’s 10-year risk of developing CVD, and can be used to guide treatment [4].

Hyperglycaemia

The use of systemic steroids has effects on glucose levels within hours, and is associated with hyperglycaemia and insulin resistance [4].

Assessment

Assess the patient’s blood glucose levels. The recommended ranges are:

Glycosylated haemoglobin (HbA1c) is a measure of blood glucose over the preceding 3 months. The level of HbA1c indicates the risk of diabetes.

Treatment of hyperglycaemia

If the blood glucose levels are not within the normal ranges, initial management should be the implementation of lifestyle modification strategies as described for CVD. If blood glucose targets are not met, glucose-lowering medications are recommended.

Random plasma glucose > 11 and < 15 mmol/L should be treated with one of the following medications (as with pre-existing type 2 diabetes):

If blood glucose levels are > 15 mmol/L, insulin may be required to control glycaemia.

Steroid-induced diabetes in children will require advice from a multidisciplinary paediatric diabetes healthcare team. Lifestyle interventions are first-line therapy, followed by insulin [4].

Gastrointestinal disease

Systemic corticosteroids can cause an increased risk of gastrointestinal events, such as gastritis, peptic ulcer, and gastrointestinal haemorrhage [1,4].

Assessment

Assess the patient’s history of risk factors for peptic ulcer [5]; these include:

Prevention of gastrointestinal disease

Following a thorough assessment, if you think a patient is at high risk of gastrointestinal disease, consider prescribing a H2 receptor antagonist or a proton-pump inhibitor [4].

Immunosuppression

The use of systemic steroids directly affects immune cells, such as T-lymphocytes, and the immune system cannot respond to infection as effectively as normal leading to an increased risk of infection [4].

Encourage the patient to present to you early if they are unwell.

Assessment

Take an immunisation history, covering the patient’s routine childhood and adult vaccines, before initiating therapy; such routine vaccines include [9]:

Any testing for chronic infection should include:

Preventing infection

Infection can be minimised by frequent hand washing, avoiding exposure to others with infection, and the use of appropriate vaccines.

Give missing or indicated vaccines before initiating systemic steroid therapy. Give live vaccines at least 2–4 weeks beforehand, as systemic steroids reduce the efficacy and increase the risk associated with vaccines [5].

Avascular necrosis

Avascular necrosis occurs when there is loss of blood flow to the bone, leading to infarction of the bone, often at the femoral head. The risk of developing osteonecrosis increases with increased doses of systemic corticosteroids [5].

Assessment

Assess the patient’s previous medical history for risk factors for avascular necrosis; risk factors include:

Ask about the patient’s alcohol consumption, as this can increase risk of avascular necrosis. Recommend they avoid excessive alcohol consumption.

Monitor patients with an elevated risk of avascular necrosis closely.

Monitoring

Monitor any joint pain and the range of motion in the joint as early diagnosis and appropriate intervention can prevent or delay the progression of avascular necrosis [1].

If avascular necrosis is suspected, you can diagnose using:

Treatment of avascular necrosis

Treatment of avascular necrosis initially involves:

If conservative management fails, additional options can be considered, such as surgery [1].

Behavioural and cognitive changes

The use of systemic steroids may alter the patient’s mood or cause memory deficit, agitation, anxiety, lethargy and psychosis [1,4].

Assessment

The patient must be screened for any of the following risk factors:

Low serum albumin levels are a predictor of psychosis in patients with systemic lupus erythematosus [1,4].

Monitor any changes in the patient’s behaviour or cognitive status.

Treatment of behavioural disorders

Lithium carbonate can be used as prophylaxis for psychosis in those patients who are predisposed to psychosis [1,4].

Persistent symptoms of psychosis may indicate antipsychotic therapy is required. Most patients recover with either dose reductions or cessation of systemic steroids.

If a patient experiences sleep disturbances and unpleasant dreams, consider changing their dose of systemic steroids to a single morning dose, or administer drugs with sedative effects at night [4].

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