The Short Answer
Corticosteroids cause weight gain, insomnia, mood changes, and osteoporosis with long-term use. Methotrexate and mycophenolate risk liver/kidney toxicity and low blood counts. TNF-α inhibitors increase infection risk (TB, fungal) and require TB screening before starting. Monthly lab monitoring catches toxicity early [1].
Prednisone side effects emerge within weeks: increased appetite, insomnia, anxiety, and mood swings are common. Long-term use (>3 months) causes osteoporosis, muscle weakness, and metabolic syndrome. Calcium 1,200 mg/day + vitamin D 2,000 IU/day + weight-bearing exercise are standard preventive measures. Taper prednisone slowly—never stop abruptly, or you risk adrenal crisis [1].
Methotrexate and mycophenolate require monthly blood work (CBC, liver function tests, creatinine) because they can damage bone marrow, liver, and kidneys. Signs of toxicity: unusual bruising, severe fatigue, dark urine, or swollen joints. Both drugs are teratogenic (harmful to pregnancy), so contraception is mandatory if you're of childbearing age [1].
TNF-α inhibitors suppress your immune system broadly, raising infection risk—especially tuberculosis, fungal infections, and opportunistic pathogens. TB screening (chest X-ray + tuberculin skin test or interferon-gamma release assay) is required before starting. Live vaccines are contraindicated. Report fever, persistent cough, or night sweats immediately [1].