Medication

Clobetasol

Clobetasol is a super-potent prescription steroid, the strongest class made for the skin. It is used in short, defined courses for thick, stubborn patches that milder steroids cannot shift.
At a Glance

Clobetasol propionate 0.05% sits at the top of the steroid potency ladder. It is the right tool for thick psoriasis plaques, scalp scale, and stubborn eczema on palms and soles, and it usually works inside one to two weeks. The honest catch is the time limit: courses run about two weeks, sometimes up to four, and no more than about 50 g a week, because at this strength enough is absorbed through the skin to affect the rest of the body. It does not belong on the face, eyelids, groin or armpits.

Key Facts

Drug ClassSuper-potent (class 1) topical corticosteroid
Other NamesTemovate, Clobex, Olux, Impoyz, Tovet, Clodan; clobetasol propionate
Prescription OnlyYes
Typical CourseTwice a day for 2 weeks, sometimes up to 4; usually capped at about 50 g per week
Cost$15 to $40 for a generic 30 g or 60 g tube. Branded foams, sprays and shampoos run $100 to $400 without coverage, and the generic ointment does the same job.

How It Works

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Clobetasol is a synthetic version of cortisol, a hormone your body makes. In the skin it shuts down the immune signals that produce redness, swelling, scale and itch, and it slows the runaway skin-cell turnover that builds a psoriasis plaque. It also narrows small blood vessels, which is part of why treated skin goes pale.

The reason it gets a page of its own is potency. Topical steroids are ranked in seven classes; clobetasol is class 1, roughly 600 to 1,000 times more powerful than over-the-counter hydrocortisone. That potency is genuinely useful — thick, scaly, lichenified skin is hard for anything weaker to get through. It also means the usual steroid side effects arrive faster and that enough can be absorbed into the bloodstream to briefly suppress your own adrenal glands. Everything about how clobetasol is prescribed — the two-week limit, the weekly gram cap, the body-site rules — follows from that single fact.

What It Treats

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Moderate evidence
In acne keloidalis nuchae, potent topical steroids are first-line for active inflammatory papules. Intermittent use is standard to limit atrophy on the posterior neck.
Moderate evidence
For alopecia areata, clobetasol is applied to bald patches rather than to a rash. It works better on the scalp than on eyebrows or beard, and long use on the face can thin the skin.
Strong evidence
Clobetasol is a super-potent steroid. On the scalp it is effective and reasonably safe short-term, but it is meant for courses of two to four weeks rather than continuous use, and stopping abruptly can cause a rebound flare.
Strong evidence
Clobetasol is reserved for thickened palm and sole skin, where its potency is needed and the skin is thick enough to tolerate it in short courses.
Strong evidence
Clobetasol is used in nummular eczema for lichenified, treatment-resistant plaques, particularly pretibial. Use is time-limited to avoid atrophy, and it is contraindicated on facial and intertriginous skin.

Who It's For & Who It's Not

Who it's for

Thick, stubborn skin that milder steroids cannot get through: plaque psoriasis, scalp psoriasis, lichen planus, discoid lupus, lichen sclerosus, alopecia areata patches, acne keloidalis nuchae, and cracked eczema on palms and soles. It is also used on lichenified skin — skin thickened like leather from years of scratching.

Who it's not for

Anyone wanting a general-purpose steroid, or one for the face, eyelids, armpits, groin or under the breasts — that skin thins quickly at this strength. It is not for large areas of the body at once, not for infants, not for open infected skin, and not for use as a long-term daily cream.

How to Take It

How much and how often
  • A thin layer, twice a day, on the affected patches only. Use the fingertip unit: a line squeezed from the fingertip to the first crease covers about two adult palms of skin. The weekly limit most dermatologists work to is around 50 g — that is roughly one large tube a week, and it exists to keep absorption low.
How long
  • Two weeks is the standard course. Some conditions are treated for up to four weeks under supervision. Continuous daily use beyond that is not the way clobetasol is meant to be used, and the risk profile changes when it is.
On the scalp
  • The solution, foam or spray goes onto the scalp itself, parting the hair in sections, not onto the hair. The shampoo formulation is applied to a dry scalp, left for about 15 minutes, then lathered and rinsed.

What to Avoid

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Do not cover treated skin with plastic wrap, a tight bandage or a nappy unless a doctor specifically told you to. Covering skin can multiply absorption several times, and clobetasol is already at the top of the scale.

Do not use it on the face, eyelids, groin, armpits or under the breasts. Thin skin at those sites absorbs far more, thins faster, and around the eyes long use has been linked to glaucoma and cataracts.

Do not use it on infected skin. Steroids let bacterial, fungal and viral infections spread. Ringworm treated with clobetasol grows quickly and loses the clear edge that identifies it.

Do not stretch it across large areas of the body — the more surface it covers, the more gets into the bloodstream.

Alcohol, food and other medicines are not an issue with the topical form. If you are also taking steroid tablets or using steroid inhalers, tell your doctor, because the effects on the body add up.

Side Effects

Common and expected
  • Stinging or burning on application, particularly on cracked skinDryness, or the treated area looking paler than the skin around it Acne-like bumps or small pustules Extra fine hair in the treated area
Tell your doctor
  • Skin that becomes thin, shiny, crinkled or bruises easily, or new stretch marks in the groin, armpits or under the breasts — these appear faster with clobetasol than with weaker steroidsFine red thread veins in treated skin Loss of skin colour in the treated area. This is far more visible on brown and Black skin, and it is one of the strongest arguments for keeping courses short and for stepping down to a weaker steroid as soon as the plaque flattens. It usually recovers over months once the steroid stops. Swelling of the face, rapid weight gain, unusual tiredness, or in children slowed growth — signs that enough has been absorbed to affect the body Blurred vision or eye pain, if it has been used near the eyes
Stop and get care
  • Spreading redness, warmth, pus or fever — an infection under a steroidWidespread pustules with fever and feeling unwell after stopping a long course, especially in someone with psoriasis — this can be a severe rebound flare and needs same-day medical care A new burning rash caused by the product, which can be an allergy to the steroid molecule or to a preservative in the base

Monitoring

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For a standard two-week course on a limited area, no tests are needed.

Monitoring starts to matter when clobetasol is used repeatedly, over large areas, or for longer than four weeks. What is watched: the treated skin itself, for thinning, stretch marks, thread veins and colour change; and how much you are getting through, which is why prescribers pay attention to tube size and refill frequency rather than asking how often you apply it.

With heavy or prolonged use a doctor may check whether your own adrenal glands have been suppressed — a morning cortisol blood test. This is uncommon, and it is checked in people using large amounts over big areas, in children, and in anyone who has been on it far longer than intended. Children are also measured for height and weight, because absorbed steroid can slow growth.

How Long Until It Works

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Itch often settles within one to two days.

By the end of week one, redness is down and a psoriasis plaque should be visibly flatter with less scale.

By two weeks, most treatable patches are flat or nearly flat. That is deliberately the same point at which the course usually ends.

What clobetasol does not do quickly is fix the colour left behind. A flattened plaque frequently leaves a brown, grey or pale mark that takes months to fade, and on brown and Black skin those marks are more obvious and last longer than they do on white skin. That is the inflammation settling, not the steroid failing, and it is not a reason to keep applying it.

If two weeks of correct use has not flattened the patch, more clobetasol is not the answer — something else is going on.

What Happens When You Stop

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For a short course on a defined patch, stopping is uneventful.

The real risk is stopping suddenly after weeks or months of continuous use. Psoriasis in particular can rebound, coming back worse than it started, and in rare cases as widespread pustular psoriasis with fever — a genuine emergency. Long-treated eczema can also flare hard when a potent steroid is withdrawn abruptly.

The way around it is a planned step down: move to a mid-strength steroid, or drop to weekend-only application, or switch to a non-steroid maintenance treatment before stopping altogether. Ask what the next step is at the same appointment where you are given the prescription, not at the end of the tube.

Separately, if a lot has been absorbed over a long period, your own adrenal glands can be sluggish for a few weeks after stopping. This recovers, but it is another reason not to end a long course abruptly.

FAQ+
Why is it only for two weeks?Because clobetasol is roughly 600 to 1,000 times stronger than drugstore hydrocortisone. At that potency, skin thinning shows up in weeks rather than months, and enough is absorbed to affect the body. The limit is not caution for its own sake — it is the trade for how well it works.
Can I put it on my face?No. Facial skin is thin and absorbs heavily, and clobetasol there causes thinning, thread veins, acne-like bumps and perioral dermatitis — which is a rash caused by facial steroids, not treated by them. Near the eyes it has also been linked to glaucoma and cataracts. The face gets desonide or hydrocortisone.
What about the groin or under the breasts?Same answer. Skin folds are thin, warm and pressed together, which works like a dressing and multiplies absorption. Stretch marks in the groin from a potent steroid are permanent.
Will it leave a pale patch?It can, and that is more visible on brown and Black skin. It comes from the steroid itself and usually fades over months after stopping. Keeping the course short and stepping down to a weaker steroid once the plaque flattens is the way to limit it.
Can I use it on my scalp long term?Scalp skin tolerates it better than most sites, and clobetasol shampoos and foams are designed for it — but the intent is still short bursts or a couple of days a week, not daily use forever. Continuous scalp use still absorbs.
Is it safe for children?Only in specific situations, at a specialist's direction. Children absorb proportionally more because they have more skin surface for their body size, and absorbed steroid can slow growth. Most children with eczema are treated with mild or mid-strength steroids instead.
Can I use it in pregnancy?Potent steroids are used cautiously in pregnancy. Large cumulative amounts have been linked to lower birth weight, so the advice is small areas, short courses, and a milder steroid where one will do. Tell your prescriber you are pregnant.
It cleared everything, so can I keep a tube for the next flare?Ask first. Using a leftover clobetasol tube on a rash that has not been looked at is how fungal infections get treated as eczema for months. It is also how people quietly end up using a class 1 steroid year-round.
What if it does not work?After two weeks of correct use, a plaque that has not budged usually means the diagnosis needs revisiting, there is an infection involved, or the condition needs a systemic treatment — tablets, an injection or light therapy — rather than a stronger cream. There is nothing stronger than class 1.