What are the side effects of dexamethasone?
Mar 19, 2025
Source: Cainiu Health
Dr. Yang Ziqi
Introduction
Under normal circumstances, dexamethasone is commonly available in tablet and injectable forms. Its possible side effects may include weight gain, elevated blood sugar levels, osteoporosis, reduced immune function, and adrenal cortex dysfunction. Patients should use the medication properly under a doctor's guidance and avoid adjusting the dosage or extending the duration of treatment on their own. Close monitoring of physical condition is necessary during medication use, and medical attention should be sought promptly if any discomfort occurs.
Generally, dexamethasone is available in forms such as tablets and injections. Its potential side effects may include weight gain, elevated blood glucose levels, osteoporosis, reduced immunity, and adrenal cortex dysfunction. A detailed analysis is as follows:
1. Weight Gain
This medication can affect the body's metabolic functions, redistribute fat, and stimulate appetite, leading to increased calorie intake. Additionally, the drug affects the kidneys' reabsorption of water and sodium ions, causing an increase in sodium ions in the body, changes in osmotic pressure, and subsequent fluid retention, which leads to weight gain.
2. Elevated Blood Glucose Levels
Dexamethasone promotes hepatic gluconeogenesis and inhibits the uptake and utilization of glucose by peripheral tissues, thereby increasing blood glucose levels. For patients with diabetes, this can make blood glucose control more difficult. Patients may experience symptoms such as thirst, increased fluid intake, frequent urination, and fatigue. Prolonged hyperglycemia can also lead to diabetes-related complications.
3. Osteoporosis
Dexamethasone inhibits the activity of osteoblasts, reduces collagen synthesis in bones, and simultaneously enhances the activity of osteoclasts, accelerating bone resorption, leading to bone loss and increasing the risk of osteoporosis. This may result in pain in the lower back; in severe cases, it can cause reduced height, kyphosis (hunchback), and even fractures, which may be triggered by minor external forces such as coughing, bending over, or lifting heavy objects.
4. Reduced Immunity
Dexamethasone has potent immunosuppressive effects, inhibiting multiple aspects of the immune system, including suppressing lymphocyte activity and proliferation and reducing antibody production, thereby lowering the body's resistance. Patients are more susceptible to infections from pathogens such as bacteria and viruses, leading to infections such as respiratory tract infections and urinary tract infections.
5. Adrenal Cortex Dysfunction
Long-term and high-dose use of dexamethasone can feedback-inhibit the hypothalamic-pituitary-adrenal axis, suppressing the adrenal cortex's ability to secrete glucocorticoids, leading to adrenal cortical atrophy. If the medication is abruptly discontinued, the adrenal cortex may not promptly resume sufficient glucocorticoid secretion, resulting in adrenal cortex dysfunction.
Patients should use the medication appropriately under a doctor's guidance, avoiding self-adjustment of dosage or duration of treatment. During treatment, patients should closely monitor their physical condition and seek medical attention promptly if any discomfort occurs, informing the doctor of the related symptoms and medication history.
