Mometasone is a prescription corticosteroid used to relieve inflammation and allergic symptoms. It helps control nasal congestion, sneezing, wheezing, itching, and skin redness by calming the body’s immune response. Doctors prescribe it for asthma maintenance, allergic rhinitis, nasal polyps, and skin conditions such as eczema, psoriasis, and atopic dermatitis. It is specifically formulated for localised delivery (via nasal sprays, inhalers, or topical creams) to ensure maximum relief at the site of inflammation with minimal absorption into the rest of the body.

Mometasone is a glucocorticoid medicine with strong anti‑inflammatory and anti‑allergic properties. It works by entering cells and binding to glucocorticoid receptors, which slows the release of substances such as leukotrienes, prostaglandins, and histamines. These chemicals normally trigger swelling, itching, mucus production, and airway narrowing, so blocking them helps relieve symptoms and improve breathing comfort.

In respiratory care, Mometasone is prescribed as a maintenance inhaler to prevent asthma attacks by reducing chronic airway inflammation. In nasal spray form, it treats allergic rhinitis by easing congestion and sneezing, and it is also a primary treatment for shrinking nasal polyps in adults with chronic sinus problems. For skin conditions, its potency makes it effective against corticosteroid‑responsive dermatoses such as psoriasis, eczema, and atopic dermatitis, where it reduces redness, itching, and scaling.

Because Mometasone is highly lipophilic, it stays primarily at the site of application. Whether applied to the skin, sprayed in the nose, or inhaled into the lungs, very little of the drug enters the bloodstream. This localised action helps avoid the systemic side effects typically associated with oral steroids, such as weight gain or bone density loss, making it suitable for long-term management under medical supervision.

Mometasone may be indicated by your doctor for:

Asthma Maintenance

For long-term prevention and control of asthma symptoms in adults and children.

Allergic Rhinitis

To treat and prevent seasonal (hay fever) and year-round allergy symptoms like sneezing, congestion, and a runny nose.

Nasal Polyps

For the treatment of chronic rhinosinusitis and the reduction of bilateral nasal polyps.

Skin Disorders

To relieve inflammation and itching associated with eczema, psoriasis, and dermatitis.

Adenoid Hypertrophy (Off-label)

Occasionally used in children to reduce enlarged adenoids.

Phimosis (Off-label)

To help soften and thin the skin in certain penile conditions in children.

Mometasone may provide benefits such as:

• Helps reduce swelling, redness, and irritation

• Improves breathing by decreasing airway inflammation in asthma

• Relieves nasal symptoms such as congestion, sneezing, and runny nose

• Reduces itching and discomfort in skin conditions like eczema and psoriasis

• Helps prevent flare-ups when used regularly

• Supports long-term control of allergic and inflammatory conditions

Common side effects of Mometasone may include

• Nasal Spray: Nosebleeds, sore throat, or a stinging sensation in the nose.

• Inhaler: Oral thrush (white patches in the mouth), hoarseness, or cough.

• Topical: Thinning of the skin (atrophy), stinging, or acne-like breakouts at the application site.

• Headache (common across all forms).

Uncommon side effects of Mometasone may include

• Blurred vision or eye pain.

• Altered sense of taste or smell.

Serious side effects that may require immediate medical attention include

• Glaucoma or Cataracts: Increased pressure in the eye (rare, usually with prolonged nasal/facial use).

• Adrenal Suppression: Extreme fatigue or weight loss (rare with localised forms unless overused).

• Severe Allergic Reaction: Difficulty breathing, swelling of the face, or severe rash.

• Nasal Septal Perforation: Damage to the wall inside the nose (very rare).

Always consult your doctor if you notice any persistent or concerning reactions while using Mometasone.

Use Mometasone exactly as directed by your doctor.

• Nasal Spray: Shake well before use. Prime the pump if using for the first time. Point the nozzle slightly away from the centre of the nose (toward the ear) to avoid irritating the septum.

• Inhaler: Use daily, even if you feel fine. Rinse your mouth with water and spit it out after each use to prevent oral thrush. Note: This is a preventive measure and will not stop an active asthma attack.

• Topical (Cream/Ointment): Apply a thin film to the affected skin area once daily. Do not cover with a bandage (occlusive dressing) unless specifically told to do so by your doctor.

• Do not use on the face, groin, or underarms for long periods without medical advice, as the skin is thinner in these areas.

Mometasone works by entering the nuclei of cells and altering the expression of genes that control inflammation. It increases the production of anti-inflammatory proteins while "switching off" the genes responsible for inflammatory cytokines.

In the nose and lungs, this reduces the recruitment of inflammatory cells (like eosinophils and mast cells) to the mucosal lining. This leads to less swelling, reduced mucus production, and less sensitivity to allergens.

On the skin, it causes vasoconstriction (narrowing of blood vessels), which reduces the redness and "heat" of the affected area, while simultaneously stopping the immune cells from attacking the skin tissue.

• Take Mometasone exactly as prescribed by your doctor.

• Use it consistently to control symptoms; do not skip doses.

• This medicine is for long‑term control of asthma and allergies. It will not relieve sudden asthma attacks. Keep a rescue inhaler available if you have asthma.

• Apply only a thin layer when using topical forms. Do not cover with bandages unless advised.

• Rinse your mouth after using inhaled forms to reduce the risk of oral thrush.

• Wash your hands after applying creams or ointments. Avoid contact with eyes, mouth, or broken skin.

• Do not stop treatment suddenly. Your doctor may recommend tapering to prevent flare‑ups.

• Report persistent nasal irritation, skin thinning, or signs of infection to your healthcare provider.

• Children using Mometasone for long periods should have their growth monitored regularly.

• Avoid prolonged or unsupervised use. Follow the duration and frequency recommended by your doctor.

• Store at room temperature (15°C to 30°C) in a dry place.

• Do not refrigerate or freeze.

• Keep the nasal spray cap on, and the inhaler mouthpiece covered when not in use.

• Keep out of the reach of children and pets.

General Diet (NO CLINICALLY RELEVANT INTERACTION): Standard food and beverages do not affect how this medication works.

• CYP3A4 Inhibitors (e.g., Ketoconazole, Ritonavir) (CAUTION): These medications can slow down the breakdown of Mometasone, potentially increasing its levels in the body and the risk of side effects.

• Other Corticosteroids (CAUTION): Using multiple steroid products (e.g., a cream plus a spray) increases the total steroid load on the body.

• Active Infections (CAUTION): Steroids can mask or worsen viral, bacterial, or fungal infections. Do not use on infected skin without an accompanying antimicrobial.

• Ocular Herpes Simplex (CAUTION): Nasal steroids should be used with caution in those with a history of certain eye infections.

• Tuberculosis (CAUTION): Inform your doctor if you have a history of respiratory tuberculosis, as steroids can potentially reactivate the condition.

If too much Mometasone has been used or if it has been used more frequently than prescribed, it is advisable to seek medical advice. Regular monitoring may be required in cases of long-term overuse to avoid complications like thinning skin, easy bruising, worsening of existing symptoms or hormonal imbalances. If accidental ingestion occurs, contact your doctor.

If you miss a dose, use it as soon as you remember. If it is almost time for your next dose, skip the missed one. Do not use a double dose to make up for a forgotten one.