Mometasone Substipharm (Mometasone Furoate Anhydrous)

Mometasone Substipharm, a topical glucocorticoid, acts on the nasal mucosa to control inflammatory allergic responses.

• Allergic rhinitis: alleviates nasal congestion, itching and sneezing by reducing mucosal inflammation.
• Seasonal allergic rhinitis: provides symptom relief during pollen seasons through anti‑inflammatory action.
• Nasal polyps: helps shrink polyps and improve nasal airflow by suppressing local immune activity.

• Mometasone furoate is a potent agonist of the glucocorticoid receptor. After intranasal administration it penetrates nasal epithelial cells and binds cytoplasmic receptors, translocating to the nucleus where it modulates gene transcription. This suppresses the production of pro‑inflammatory cytokines, chemokines and arachidonic‑acid metabolites, leading to decreased vascular permeability and edema in the nasal mucosa.

Mometasone Substipharm may cause local and systemic adverse reactions, most of which are mild and reversible.

Common Side Effects

• Nasal irritation or burning.
• Nosebleeds (epistaxis).
• Headache.
• Throat dryness.

Serious or Rare Side Effects

• Nasal septal perforation.
• Secondary fungal infection of the nasal cavity.
• Adrenal suppression with prolonged high‑dose use.
• Severe allergic reaction (anaphylaxis).

Before prescribing Mometasone Substipharm, clinicians should consider several safety precautions to minimize risk.

• Assess for active infections: avoid use in patients with untreated bacterial, viral or fungal nasal infections.
• Monitor for signs of adrenal insufficiency: especially with long‑term or high‑dose therapy.
• Caution in patients with glaucoma or cataracts: glucocorticoids may exacerbate ocular pressure.
• Evaluate for hypersensitivity: discontinue if rash, swelling or breathing difficulty occurs.
• Use the lowest effective dose for the shortest duration needed.
• Store at below 25°C: keep in the original container, protect from moisture and direct sunlight.

Mometasone Substipharm can interact with other medicines that affect steroid metabolism or immune function.

Major Interactions (Avoid)

• Systemic corticosteroids: may increase risk of systemic glucocorticoid effects.
• Strong CYP3A4 inhibitors (e.g., ketoconazole): can raise local drug exposure.
• Live vaccines: intranasal steroids may reduce vaccine efficacy.

Moderate Interactions (Monitor Closely)

• Antifungal agents (e.g., itraconazole): may modestly increase steroid levels.
• Antihistamines: additive sedation is unlikely but monitor symptom control.
• Immunosuppressants (e.g., azathioprine): watch for enhanced immunosuppression.