Medication

Ciclopirox

Ciclopirox is a prescription antifungal that works by a completely different route from the azoles. It covers fungus, yeast and some bacteria, which makes it a useful switch when other antifungals stop helping or irritate the skin.
At a Glance

Ciclopirox is a prescription antifungal cream, gel or shampoo. It is not an azole and not an allylamine — it works by starving fungal cells of the metals their enzymes need — so it is a genuine alternative when ketoconazole or clotrimazole has stopped working or irritated the skin. Its coverage is broad: dermatophytes, Candida, the Malassezia yeast behind dandruff and tinea versicolor, and some bacteria. It also has a mild anti-inflammatory effect, which is why it suits red, itchy seborrheic dermatitis. It is not better than ketoconazole, just different, and it costs more.

Key Facts

Drug ClassTopical hydroxypyridone antifungal
Other NamesLoprox, Ciclodan, Penlac (the nail lacquer), ciclopirox olamine
Prescription OnlyYes in the United States for all skin and scalp forms
Typical CourseCream or gel twice a day for 2 to 4 weeks; shampoo twice a week for 4 weeks, then less often for maintenance
CostGeneric cream is roughly $20 to $70 for a 30 g tube; the 1% shampoo runs about $25 to $90 per bottle. Prices vary widely between pharmacies, so it is worth checking a discount card.

How It Works

−

Most antifungals attack the fungus's ability to build ergosterol, the fat in its outer membrane. Ciclopirox does something else. It grabs hold of metal ions — mainly iron — that fungal enzymes need in order to work. Deprived of those, the fungus cannot make energy, cannot repair itself and cannot clear its own waste. It dies rather than simply stopping.

Because that mechanism is not shared with the azoles or with terbinafine, ciclopirox often works when one of those has failed, and it is a reasonable choice for someone whose skin reacts to them. The same broad mechanism gives it unusually wide coverage: dermatophytes, Candida, Malassezia, and a range of gram-positive and gram-negative bacteria. It also damps down some of the inflammatory chemicals in the skin, which is part of why the shampoo settles an itchy, red scalp rather than just reducing the yeast.

What It Treats

−
Strong evidence
Ciclopirox works against the same yeast as ketoconazole but through a different mechanism, which is why switching to it often helps when the other has lost its effect.
Moderate evidence
Ciclopirox works by a different mechanism to the azoles, which makes it a useful alternative in Malassezia folliculitis when ketoconazole fails or is not tolerated.
Moderate evidence
Ciclopirox is active against Malassezia and is an alternative topical for pityriasis versicolor, particularly where azoles are not tolerated.
Moderate evidence
Ciclopirox works by a different mechanism to the azoles and allylamines, and covers dermatophytes, yeasts and some bacteria. A reasonable alternative when other topicals irritate.
Moderate evidence
Ciclopirox has a distinct mechanism from azoles and allylamines and covers dermatophytes, yeasts and some bacteria. A reasonable alternative when other topicals are not tolerated.

Who It's For & Who It's Not

Who it's for

Seborrheic dermatitis or dandruff that has stopped responding to ketoconazole — switching classes often restores control.

Athlete's foot, ringworm or tinea versicolor in someone who reacts to azole creams.

Fungal acne (Malassezia folliculitis) that has not cleared with ketoconazole.

Rashes where fungus and bacteria may both be involved.

Who it's not for

A first attempt at ordinary ringworm or athlete's foot. Over-the-counter terbinafine works as well and costs far less.

Nail infections — unless you are prescribed the 8% nail lacquer, which is a different product with its own page.

Scalp ringworm, which needs a tablet.

Anyone who has reacted to ciclopirox before.

How to Take It

Cream or gel on the skin
  • A thin layer twice a day, rubbed in, to the rash and about an inch past its edge. Continue for two to four weeks, and keep going one to two weeks after the skin looks normal. On the feet, cover the whole foot including every toe web.
Shampoo on the scalp
  • Wet the hair, apply to the scalp rather than the hair, and work it into the skin in sections. Leave it on three full minutes — set a timer, because three minutes is longer than it feels — then rinse. Twice a week for four weeks during a flare.
Keeping it under control afterwards
  • Seborrheic dermatitis comes back. Most people carry on with the shampoo once every week or two indefinitely. That maintenance wash is what decides whether you are back in three months.

What to Avoid

−

Eyes. The shampoo stings badly — rinse thoroughly if it gets in.

Steroid creams on the same fungal patch without advice.

Airtight dressings over treated skin.

Rinsing the shampoo out immediately. Contact time is most of the treatment; a quick wash does very little.

Bleached, permed or coloured hair — medicated shampoos can dull colour. This is cosmetic, not dangerous.

There are no interactions with medicines taken by mouth, no alcohol issue and no sun issue. Very little ciclopirox is absorbed through skin.

Side Effects

Common and expected
  • Burning, stinging or itching where it is applied — more common with the gel than the creamRedness or dryness at the site Scalp irritation, or hair that feels drier after the shampoo Mild, temporary changes in hair texture with regular shampoo use
Tell your doctor
  • Irritation that keeps worsening past the first weekNo improvement after four weeks Worsening redness, weeping or crusting, which can suggest bacterial infection A new rash spreading beyond the treated area, which may be an allergy to the product
Stop and get care
  • Hives, swelling of the face or lips, or trouble breathingBlistering or peeling of the treated skin

How Long Until It Works

−

The first week

Itch usually settles first — often faster than the flaking does. On the scalp, that easing itch is the earliest sign it is working, even if you can still see scale.

Weeks two to four

Redness and scaling drop off. This is the point at which most people would have given up on a medicated shampoo, which is exactly why so many decide these products do not work.

At four weeks

Skin infections should be clear. Seborrheic dermatitis should be well controlled. If nothing has changed at all, the diagnosis is worth revisiting.

Long term

Seborrheic dermatitis and dandruff are controlled, not cured. The yeast is a normal resident of your skin and does not leave. Expect flares in winter and during stressful stretches.

The marks afterwards

Patches that clear can leave lighter or darker skin for weeks to months, most noticeably on brown and Black skin. That is pigment change from the inflammation, not remaining infection.

What Happens When You Stop

−

For a one-off infection — ringworm, athlete's foot, tinea versicolor — you stop at the end of the course. Nothing rebounds.

For seborrheic dermatitis, dandruff or fungal acne, stopping completely is usually followed by a return within weeks to a couple of months. That is not the drug failing; those conditions are driven by a yeast that lives on everyone's skin permanently, and treatment keeps its numbers down rather than removing it. Most people move to a maintenance wash every week or two instead of stopping outright.

There is no withdrawal, no taper and no rebound flare worse than the original.

FAQ+
How is ciclopirox different from ketoconazole?They treat the same yeast but through completely different chemistry. That is the point: if ketoconazole has stopped working or irritates you, ciclopirox is a real alternative rather than a similar drug with a different name.
Is it stronger than an over-the-counter antifungal?Not exactly stronger — broader. It covers dermatophytes, Candida, Malassezia and some bacteria. For plain athlete's foot, over-the-counter terbinafine is at least as effective and much cheaper.
Will the shampoo cure my dandruff?No. It controls it. The yeast behind dandruff lives on everyone's scalp and does not go away, so most people need an occasional maintenance wash long term.
How long do I leave the shampoo on?Three minutes, on the scalp rather than the hair. Rinsing it straight out is the most common reason a medicated shampoo appears not to work.
Can I use it on my face?Yes — the gel and cream are commonly used for seborrheic dermatitis around the nose, eyebrows and beard. Keep it out of the eyes.
Does ciclopirox treat fungal nails?Only the 8% lacquer version, and even then it works far less well than tablets. The cream and shampoo do nothing for nails.
Can I use it while pregnant?Very little is absorbed through the skin. Discuss it with your doctor, particularly for repeated use over large areas or on the scalp.
Why does my scalp get worse in winter?Cold, dry air and indoor heating make seborrheic dermatitis flare in most people. Go back to washing more often for a few weeks and it usually settles.
Can I use it with a steroid scalp solution?Often yes, and that combination is common for a bad flare — the steroid settles the inflammation quickly while the antifungal reduces the yeast. Your doctor should set how long the steroid runs for.