Medication

Tacrolimus (Protopic)

A non-steroid ointment for eczema, used where steroids are hardest to keep using: the face, the eyelids, and skin folds. It carries a boxed warning that twenty years of follow-up have not supported.
Dr. Schwarz, MD · Board-certified dermatologistLast reviewed September 8, 2026
16:9 hero for Tacrolimus (Protopic). Never cropped: the tone strip and the corner logo depend on the full frame.

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Tacrolimus ointment works, and it gets abandoned at the pharmacy counter more than almost anything I prescribe, because of the warning on the box. That warning came from animal studies at doses far above anything skin absorbs, and twenty years of large studies have not found the lymphoma it describes. I use it on the face, the eyelids and skin folds, where months of steroid would thin the skin and this will not. The stinging in the first week is real and it goes away — saying that up front is what keeps people on it.

— Dr. Schwarz, Board Certified Dermatologist

Key Facts

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Also calledProtopic
Drug classTopical calcineurin inhibitor — a non-steroid anti-inflammatory
Applied as0.03% and 0.1% ointment
Typical courseTwice daily during flares, then often twice weekly to prevent them
Time to workItch within days, skin over 1 to 3 weeks
Prescription onlyYes

What It Is

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Tacrolimus is a prescription ointment approved in 2000 for moderate to severe atopic dermatitis — eczema — when other treatments are unsuitable. The 0.03% strength is licensed from age two, the 0.1% from age sixteen. The same drug is given by mouth, at far larger doses, to stop the body rejecting a transplanted organ. That is where its reputation comes from. On skin, almost none of it reaches the bloodstream. It is not a steroid, so it does not thin skin — which is why it goes on the face, eyelids, neck and skin folds.

How It Works

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T cells only make inflammatory signals after an internal switch called calcineurin is thrown. Tacrolimus enters the cell, binds a carrier protein, and the pair blocks calcineurin. The T cell then stops producing interleukin-2 and the other messengers that keep an eczema patch inflamed and itchy. It quiets mast cells and the immune cells in the outer layer of skin the same way.

That narrow target explains the rest. Tacrolimus acts on immune cells, not on the fibroblasts that make collagen, so it causes none of the thinning, stretch marks or visible vessels that limit strong steroids on thin skin. The molecule is large and greasy and crosses healthy skin poorly, so blood levels are usually undetectable and fall further as the barrier repairs. First-week burning is a separate effect on nerve endings in inflamed skin, which is why it fades as the rash settles instead of building with use.

Here is where Tacrolimus (Protopic) acts in the skin, and what the others do instead.

About Tacrolimus (Protopic)
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Skin basics
BARRIEREPIDERMISDERMIS28 daysQUIETS THE IMMUNE SIGNALHARD TO GET INSLOWS SKIN CELLS DOWN

The redness, swelling and itch are the immune system reacting, not the damage itself. Tacrolimus (Protopic) turns that reaction down where it is happening, in the skin, which is why a rash settles within days. Not a steroid: it blocks calcineurin inside the immune cell. It does not thin the skin, so it suits eyelids, face and folds. It stings for the first few days.

Tacrolimus is a large molecule and crosses poorly through healthy skin — more easily through skin that is already inflamed. It gets in where it is needed and much less where it is not.

In a plaque, skin cells travel from the bottom of the epidermis to the surface in four to six days instead of a month, and pile up as scale. This slows them back down, so the plaque thins.

The outer film of dead cells and oil. It holds water in and keeps irritants out, and it is thinner than a sheet of paper. Almost every dry, itchy, stinging skin problem starts here.

The outer layer, and the only one anything in a jar reaches. It renews itself constantly: a cell made at the bottom takes about a month to reach the surface and flake off. Most of what a skincare product does, it does here.

The living layer underneath, holding the blood vessels, the nerves and the collagen. It is where lasting change happens and it is hard to reach: most of what is sold for the skin never gets this far.

What It Treats

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Eczema
Eczema
Strong evidence
An ointment that calms the same immune signal a steroid does, without being one. It does not thin skin, so it suits the eyelids, the face and the folds, and it can be used twice a week to stop flares coming back. Expect stinging for the first week or so.
Vitiligo
Vitiligo
Strong evidence
The usual choice for vitiligo on the face, eyelids, neck and skin folds, because it quiets the immune attack without thinning the skin, so it can be used in those places for months. It stings or feels warm for the first week or two in some people. It works best on the face and much less well on hands and feet.
Contact Dermatitis
Contact Dermatitis
Strong evidence
A non-steroid ointment for the eyelids, face and skin folds, where repeated steroid use thins the skin. It calms the same immune reaction without that risk, which makes it useful for eyelid dermatitis that keeps returning while the trigger is being tracked down. It stings for the first few days, and that usually passes.
Seborrheic Dermatitis
Seborrheic Dermatitis
Moderate evidence
Calms the inflammation on the face without thinning the skin, which is what makes it useful around the nose creases and the eyebrows where steroids cannot be used for long. It stings or feels warm for the first few applications and then settles. It is often used twice a week to hold a face that keeps flaring.
Dandruff
Dandruff
Moderate evidence
A non-steroid ointment used mainly where dandruff has spread onto the face — the eyebrows, the creases beside the nose, behind the ears. It calms the same inflammation without thinning that thin skin, which matters when the area needs treating on and off for years. It stings for the first few days. It is awkward to apply in hair, so it is rarely the choice for the scalp itself.
Psoriasis
Psoriasis
Moderate evidence
A steroid-free ointment used on the face, eyelids, genitals and body folds, where psoriasis is thin and smooth and steroids cannot be used for long. It does not thin the skin. It stings or feels warm for the first week or so, which settles, and it works less well on thick plaques elsewhere.

Not the Best For

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Thick, scaly plaques
Doesn't work
It is made for inflamed, thin skin and does not penetrate a thick plaque well. Something stronger usually has to flatten the plaque before this can hold it.
Infected skin
Doesn't work
It works by quieting the immune response in the skin, so it does nothing for eczema that has become infected. The infection is treated first, then this goes back on.

Forms

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One form, an ointment, in two strengths.

Greasy, slow to absorb, shiny for a while afterward. That suits dry eczema and irritates people using it on the face in the morning. There is no cream, lotion or scalp version. Pimecrolimus, the milder drug in the same class, comes as a cream — the usual pick for daytime facial use.

Strengths

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Two strengths, chosen by age and by where the ointment is going, not by escalating until something works.

WeakestStrongest
0.03%0.1%
The lower strength
0.03%
Licensed from age two. The usual choice for children, eyelids and face.
The higher strength
0.1%
Licensed from age sixteen. For adults and for thicker, stubborn skin such as hands and neck.

Basics

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When to Apply
A thin layer twice a day to the affected skin, rubbed in gently. It goes on the rash, not over clear skin. Keep moisturizer a couple of hours apart — layering one straight onto the other has not been studied.
How to Start
Twice a day until the patch clears, usually one to three weeks, then stop. Many people then move to maintenance — twice a week on the places that always flare, even when they look normal. That is well supported and makes flares less frequent.
If It Irritates
Burning or stinging for fifteen to thirty minutes after applying is very common in the first days and is not an allergy. It settles within about a week. Keeping the tube in the fridge, applying to dry rather than damp skin, and skipping alcohol early on all help.
If It's Not Working
Check it is going on twice a day — two to three weeks is a fair trial. Then the options are the higher strength if you are an adult on 0.03%, a short steroid course to break the flare, or a look at whether infection or a contact allergy is driving the rash.

Sample Routine

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Here is where Tacrolimus (Protopic) sits in a day, and what goes around it. Pick what you are treating and what your skin is like, and the rest of the routine changes to suit.

What to Expect

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First few minutes | Applying it
A thin layer twice a day. Burning or stinging for a short while afterward is common and worst in the first week.
Days 1 to 7 | Adjusting
Burning is at its worst now. Itch often improves in the same week, which is what gets most people through.
Weeks 1 to 3 | Working
Redness and thickening settle and the burning has usually stopped. Most people reach their best result here.
Maintenance | Keeping flares apart
Once clear, twice-weekly use on the trouble spots lengthens the gaps between flares. Licensed, not an improvisation.

What to Avoid

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  • Alcohol while using it A flushed, warm face and neck after a drink is recognized and harmless, and it stops when the drug does.
  • Strong sun and tanning beds The label advises limiting ultraviolet exposure on treated skin. Sunscreen and a hat on a treated face anyway.
  • Sealing the area under a dressing A tight dressing increases absorption and is not how the drug was studied.
  • Applying it to infected skin Treat cold sores, impetigo or a spreading warm rash first. Quieting immune activity on top of an infection is the wrong order.
  • Open, weeping skin Absorption is greater and stinging is worse. Wait until the surface is intact.
  • The eye itself Eyelid skin is a main use. Keep it off the lid margin and out of the eye.

Monitoring

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No blood tests are needed. Blood levels are usually undetectable with the ointment and fall further as the barrier repairs — the opposite of the oral form used after transplants. Monitoring is a check at two to three weeks on whether the rash responded, then a plan for maintenance.

The boxed warning is the part to understand. It says long-term safety is not established, that rare cases of lymphoma and skin cancer were reported in people who used these drugs, and that continuous long-term use should be avoided. It was added in 2006, based mainly on animal studies using very high doses by mouth or injection, plus scattered case reports.

What has happened since matters. Large cohort studies, and a registry that followed treated children for a decade, have not found the rise in lymphoma the warning describes. Guidelines in the United States and Europe still recommend these drugs, including on the face and eyelids and as twice-weekly maintenance. The concern was theoretical, more than twenty years of use has not borne it out, and how long to continue is still a decision to make with a doctor.

Day-to-day monitoring is simple: keep skin checks routine, use sun protection on treated areas, and pause during a skin infection.

If You Stop

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No taper, no withdrawal. Stop when the patch clears and restart when it comes back. Eczema tends to return within weeks on the areas that always flare. Twice-weekly maintenance is the licensed answer, and it beats waiting for the next flare and starting over. There is no rebound of the kind that can follow stopping a strong steroid on the face. That is one of the reasons this drug exists.

Cost

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Both strengths come as generics, which brought the price down a long way, though it still costs more than a generic steroid ointment. Prices vary widely between pharmacies and discount cards sometimes beat insurance, so check more than one. Prior authorization is still common, usually asking that a topical steroid was tried first. Tube size is the practical variable: twice-daily use means a small tube treating a child's face lasts far longer than the same tube on two hands.

Ask Your Doctor

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If you are pregnant or breastfeeding
Planning a pregnancy counts too. Absorption through skin is very low, but ask the doctor managing your pregnancy first, and keep it off the nipple area.
If you have a weakened immune system
The label advises caution, including people on immune-suppressing drugs and transplant recipients.
If you get cold sores
Or have had eczema herpeticum. A spreading, painful, blistered flare needs same-day attention, and the ointment is paused while it is treated.
If you have Netherton syndrome
Or another condition where the barrier is broadly broken. More drug is absorbed, and the label warns against use.
If the burning has not settled
It should be fading by about two weeks. Burning that persists or worsens needs a review.
If you expect to use it for months on end
The label asks for the shortest suitable use, so maintenance should be a plan made with a doctor, not a prescription running unreviewed.
If you are due phototherapy
Or spend long stretches in strong sun. The label advises limiting ultraviolet exposure here.

How It Compares

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Pimecrolimus cream
The same
the milder drug in the same class, in a cream rather than an ointment, and easier to wear on the face during the day. Good evidence in mild disease and weaker than tacrolimus in moderate disease. It carries the same boxed warning.
Topical steroids
Different job
cheaper, faster, and backed by decades of evidence. They remain first choice for most flares. The limit is how long they can be used on thin skin, which is where tacrolimus takes over.
Crisaborole ointment
Worse
another non-steroid, with no boxed warning, licensed for mild to moderate disease. Milder than tacrolimus, and usually more expensive.
Ruxolitinib creamDiagram: how Ruxolitinib Cream (Opzelura) works in the skin
Ruxolitinib cream
Different job
a topical JAK inhibitor with strong short-term trial results, its own boxed warning, and limits on the area and duration of use. Considerably more expensive.
Dupilumab and the other injected biologics
Different job
for eczema too widespread or too severe for creams to hold. A different scale of treatment and a different scale of cost, and topicals usually continue alongside.

Myths

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  • "It causes cancer." The boxed warning reports rare cases and says long-term safety is not established. It does not establish that the drug caused them. Studies following large numbers of treated people for years, including a ten-year registry of treated children, have not found the increase.
  • "It is a steroid." It is not. It blocks a switch inside T cells and has no effect on collagen, so it does not thin skin.
  • "It is the same as the transplant tablets." Same drug, different setting. The tablets give a body-wide dose that needs blood monitoring. With the ointment, blood levels are usually undetectable.
  • "You cannot use it near the eyes." Eyelid eczema is one of the main reasons it is prescribed. Keep it off the eye itself.
  • "The burning means it is damaging my skin." A nerve effect, not damage. Worst in the first days, typically gone within a week.

Questions Patients Ask

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Is the cancer warning real?

Yes, and it is printed on the label — long-term safety is not established, and rare cases were reported. Studies following large groups for years have not found the increased risk. A caution, not a demonstrated harm.

Why does it burn?

It acts on nerve endings in inflamed skin as well as on immune cells. Burning is worst in the first few days and gone within a week as the rash heals.

Can I use it on my eyelids?

Yes — eyelid eczema is one of the main reasons it gets prescribed. Keep it off the eye itself and the lid margin.

Why did my face go red after a glass of wine?

Alcohol flushing is a known effect while using it. Harmless, and it stops when the treatment does.

Can I use it indefinitely?

The label asks for the shortest suitable use and for breaks. Twice-weekly maintenance on trouble spots is licensed and widely used. Make that decision with a doctor rather than leaving a prescription running.

Do I need blood tests?

No. Blood levels are usually undetectable with the ointment. The tablets are a different treatment entirely.

References

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