Inandex (Dexamethasone Phosphate)

Dexamethasone phosphate is used to manage inflammatory and immune‑mediated conditions across several organ systems.

• Severe allergic reactions: rapid reduction of airway edema and systemic hypersensitivity.
• Acute asthma exacerbations: improves airflow by decreasing airway inflammation.
• Musculoskeletal inflammation: alleviates pain and swelling in joints and soft tissues.
• Rheumatoid arthritis flares: suppresses joint inflammation and damage progression.
• Oncology supportive care: reduces chemotherapy‑induced nausea and edema.

• Dexamethasone phosphate enters cells and binds cytoplasmic glucocorticoid receptors, forming a complex that translocates to the nucleus. The complex interacts with glucocorticoid response elements on DNA, regulating transcription of anti‑inflammatory proteins and repressing pro‑inflammatory cytokines. This modulation decreases leukocyte migration, capillary permeability, and immune activation, producing potent anti‑inflammatory and immunosuppressive effects.

Systemic exposure to dexamethasone phosphate can produce a range of adverse reactions, varying in frequency and severity.

Common Side Effects

• Increased blood glucose: hyperglycemia, especially in diabetic patients.
• Mood changes: irritability, anxiety, or insomnia.
• Gastrointestinal discomfort: nausea, abdominal pain, or dyspepsia.
• Fluid retention: mild edema and weight gain.

Serious or Rare Side Effects

• Severe infection: heightened susceptibility to bacterial, viral, or fungal infections.
• Adrenal suppression: risk of adrenal insufficiency on abrupt discontinuation.
• Osteonecrosis: bone tissue death, particularly in weight‑bearing joints.
• Psychiatric disorders: psychosis or severe depression.

Before initiating dexamethasone phosphate therapy, clinicians should evaluate several safety considerations.

• Infection risk: assess for active infections and avoid use in uncontrolled sepsis.
• Blood glucose monitoring: regularly check glucose levels in diabetic or at‑risk patients.
• Cardiovascular status: monitor blood pressure and watch for fluid retention.
• Bone health: consider calcium and vitamin D supplementation to mitigate osteoporosis risk.
• Pregnancy and lactation: use only if benefits outweigh potential risks to the fetus or infant.
• Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

Dexamethasone phosphate may interact with other medicines, altering its efficacy or safety profile.

Major Interactions (Avoid)

• Strong CYP3A4 inhibitors (e.g., ketoconazole, itraconazole): may increase corticosteroid levels and toxicity.
• Live vaccines: concurrent use can suppress immune response and increase infection risk.
• Anticoagulants (warfarin): enhanced anticoagulant effect, requiring closer INR monitoring.

Moderate Interactions (Monitor Closely)

• Non‑steroidal anti‑inflammatory drugs (NSAIDs): combined use raises gastrointestinal ulcer risk.
• Diuretics (loop or thiazide): may exacerbate hypokalemia and fluid imbalance.
• Antidiabetic agents: corticosteroid‑induced hyperglycemia may necessitate dose adjustments.