Betamethasone

Betamethasone is a potent topical corticosteroid used to treat a range of inflammatory skin conditions, including eczema, psoriasis, dermatitis, and other steroid-responsive dermatoses.

It reduces redness, itching, swelling, and discomfort by suppressing the local immune and inflammatory response within the skin.

Betamethasone valerate (0.1%) is classified as a moderately potent topical corticosteroid, while betamethasone dipropionate (0.05%) is classified as potent.

The choice of preparation depends on the severity and location of the skin condition.

Cream formulations are generally preferred for moist or weeping areas, while ointments are more suitable for dry, lichenified, or scaly skin.

Topical corticosteroids remain the cornerstone of management for inflammatory skin diseases.

They work by binding to intracellular glucocorticoid receptors, suppressing the production of inflammatory cytokines, reducing vascular permeability, and inhibiting the migration of inflammatory cells to the affected area.

Betamethasone is available in various formulations including creams, ointments, lotions, and scalp applications.

It may be combined with antimicrobials such as fusidic acid, clioquinol, or neomycin for infected dermatoses, and with salicylic acid for hyperkeratotic conditions.

Apply a thin layer of betamethasone cream or ointment to the affected area once or twice daily, as directed by your prescriber. Gently rub it into the skin until it is absorbed.

Wash your hands after application unless you are treating the hands.

Use the fingertip unit (FTU) method to gauge the correct amount.

One FTU (the amount squeezed from the nozzle to the first crease of an adult's index finger) covers an area roughly the size of two adult palms.

Do not use betamethasone under airtight dressings unless specifically instructed.

Reduce the frequency of application as the condition improves and step down to a milder corticosteroid or emollient when possible.

Adults: apply thinly once or twice daily. Treatment should generally not continue for more than two weeks on the face or flexural areas, or four weeks on the body, without review.

For the scalp application, apply a small amount to the affected areas twice daily.

Children: use under medical supervision only. The lowest effective strength and duration should be used. Avoid prolonged application to the face, skin folds, and nappy area.

Do not exceed the prescribed amount or frequency. Overuse increases the risk of local and systemic side effects.

Local side effects with prolonged use include skin thinning (atrophy), stretch marks (striae), telangiectasia (visible blood vessels), and easy bruising.

Contact dermatitis to the preparation itself is possible but uncommon.

On the face, prolonged use may cause perioral dermatitis, steroid rosacea, or acneiform eruptions. Depigmentation may occur, particularly in darker skin tones.

Systemic absorption is generally low with short-term, localised application. However, extensive use, application under occlusion, or use on thin skin (face, flexures, genitals) increases absorption.

Systemic effects such as adrenal suppression, Cushing-like features, and growth retardation in children are rare but documented.

Hypertrichosis (increased hair growth) at the application site has been reported occasionally.

Do not use betamethasone on the face for more than five to seven days unless directed by a dermatologist. Facial skin is thin and especially vulnerable to steroid-induced atrophy and rosacea.

Avoid applying betamethasone to infected skin unless an appropriate antimicrobial agent is being used concurrently. Corticosteroids can mask or worsen skin infections.

If an infection develops during treatment, stop the corticosteroid and seek medical advice.

Long-term use requires regular monitoring. Withdraw treatment gradually where possible to avoid rebound flares. Inform your prescriber if you are pregnant, breastfeeding, or planning a pregnancy.

Betamethasone must not be applied to untreated bacterial, viral, or fungal skin infections, including impetigo, herpes simplex, varicella, and tinea.

It is contraindicated in acne vulgaris, rosacea, perioral dermatitis, and pruritus without inflammation.

Do not use betamethasone if you have a known allergy to betamethasone or any of the formulation's excipients.