Athlete's Foot Treatment: Four Boxes, Four Durations, and One That Depends on Where It Is

Four antifungal creams sit next to each other in the same aisle, and the numbers printed on them are one week, two weeks and four weeks. Not marketing numbers: Drug Facts panels, where the duration is part of the directions. One of the four gives two durations of its own, a shorter one for between the toes and a longer one for the sole; another says outright that its effectiveness on the sole is unknown. So athlete's foot treatment starts with a question the shelf does not ask, which is where on the foot the infection actually is, and ends with a number read off the box you chose rather than with the day the itching stops.

Where it is decides which box

Lamisil AT's cream is the one that splits its own directions by site. Between the toes: between the toes only: apply twice a day (morning and night) for 1 week or as directed by a doctor. On the sole: on the bottom or sides of the foot: apply twice a day (morning and night) for 2 weeks or as directed by a doctor. Same tube, same active, twice the course, because the skin on the sole is thicker and the infection there is a different job.

Lotrimin Ultra draws the line harder. Its label states what it cures and then, in the same breath, what is not known: cures most athlete's foot between the toes. Effectiveness on the bottom or sides of foot is unknown. A reader with scaling across the sole is outside what that box claims, by the box's own words.

That matters because the sole is where the pattern lives that gets mistaken for dry skin. DermNet describes a form of tinea pedis as scale covering the sole and sides of the feet, the hyperkeratotic or moccasin type, and telling that from ordinary cracked heels is the subject of why do heels crack. Athlete's foot on the bottom of the foot is therefore two decisions at once: is it fungal at all, and does the product cover that part of the foot.

One week, two weeks, four weeks

The other two labels give one duration each, for the whole foot.

Clotrimazole 1% cream: apply twice daily, and for athlete's foot and ringworm, use daily for 4 weeks; for jock itch, use daily for 2 weeks. Its stop rule names the same number: ask a doctor if there is no improvement within 4 weeks (for athlete's foot or ringworm) or 2 weeks (for jock itch).

Tinactin, tolnaftate 1%: twice daily, and use daily for 4 weeks; if condition persists longer, ask a doctor.

So terbinafine vs clotrimazole, as a question about time, is one week against four for an infection between the toes, and both numbers are on their own labels. This page does not translate that into "terbinafine is stronger"; a duration on a Drug Facts panel is what the manufacturer's evidence supported for that product, and DermNet, listing the classes without ranking them, gives the general picture: Topical antifungal therapy once or twice daily is usually sufficient. These include azoles, allylamines, butenafine, ciclopirox, and tolnaftate. A typical course is 2 to 4 weeks, but single dose regimes can be successful for mild infection. None of the four products here carries a single-dose label, so that last clause is not an instruction anyone on this page can follow.

What none of the four says is "until it clears". How long to use athlete's foot cream has a number on every box, and the number does not move because the itch stopped in four days. Stopping at the symptom is the mechanism behind the next section.

The half that is not a cream

DermNet puts the non-product half first: General measures should be first-line, including meticulous drying of feet, especially between the toes, avoidance of occlusive footwear, and the use of barrier protection (sandals) in communal facilities.

Its prevention list adds the parts that outlast the tube. Dry feet and toes meticulously after bathing. Use desiccating foot powder once or twice daily. Avoid wearing occlusive footwear for long periods and Thoroughly dry shoes and boots. Clean the shower and bathroom floors using a product containing bleach. And Treat shoes with antifungal powder.

Two of the product labels carry the same idea in their own directions: Lamisil AT tells the reader to wear well-fitting, ventilated shoes and change shoes and socks at least once daily, and Tinactin says to pay special attention to spaces between the toes; wear well-fitting, ventilated shoes and change shoes and socks at least once daily. How the organism is picked up in the first place, and what shoes have to do with it, is in why do heels crack.

The four reasons it comes back

Athlete's foot keeps coming back is a common enough outcome that DermNet lists the causes in one sentence: If treatment of tinea pedis is unsuccessful, consider reinfection, coexistent untreated fungal nail infection , reinfection due to untreated family member, or an alternative diagnosis.

Four things, and none of them is a stronger cream.

Reinfection, from the floor, the shoes or the towel that were never dealt with, which is the prevention list above.

An untreated nail infection, which is a reservoir the creams on this page explicitly do not reach. Clotrimazole's label: this product is not effective on the scalp or nails. Lamisil AT's says, under do not use, on nails or scalp. Thickened, discolored nails alongside a foot that keeps flaring are a reason to see someone rather than to buy the tube again.

An untreated household member, walking the same floors barefoot.

A different diagnosis, which is where the sole pattern comes back into it: a foot that has been treated as fungal for months and is not improving may not be fungal.

If the sole is thick and scaly

DermNet has one line for this situation, and its wording matters: Patients with the hyperkeratotic variant of tinea pedis may benefit from the addition of a topical keratolytic cream containing salicylic acid or urea. An addition, not a replacement. The urea and salicylic acid creams that thin thickened skin are the subject of cracked heels, and on DermNet's reading they go alongside antifungal treatment for this variant rather than instead of it.

If you have been using a urea heel balm on a scaly sole for weeks with no change, that sentence is the one to take to a clinician, because it suggests the two questions have been collapsed into one.

The four products, by what the label says

The card near the top lists four products, one per active, on the same six points: the active and strength; what the label says it cures, including any site restriction; the regimen, with the site split where the label makes one; the stop-and-ask-a-doctor trigger; the nails and scalp line; and what was not checked.

Lamisil AT Cream, terbinafine 1%. Cures, per the label, cures most athlete's foot (tinea pedis), with no site restriction on what it treats and a site split in how long. Regimen: the one-week and two-week lines above. Stop rule: the label says to stop and ask a doctor if too much irritation occurs or if there is no improvement after four weeks. Nails and scalp: do not use. Not checked: which works better, comfort, price.

Lotrimin Ultra Athlete's Foot, butenafine 1%. Active: Butenafine hydrochloride 1%. Cures: between the toes, with the sole stated as unknown, quoted above. Regimen: apply to affected skin between and around the toes twice a day for 1 week (morning and night), or once a day for 4 weeks, or as directed by a doctor. Two schedules, same product, both on the label. Note that the same brand name sits on a jock itch cream and a ringworm cream with different labels; the athlete's foot one is this. Not checked: the same three.

Lotrimin AF Athlete's Foot Cream, clotrimazole 1%. Active: Clotrimazole 1% (w/w). Cures: most athlete's foot, jock itch and ringworm, no site restriction. Regimen and stop rule: the four-week lines above. Nails and scalp: not effective. Not checked: the same three.

Tinactin Antifungal Cream, tolnaftate 1%. Active: Tolnaftate 1%. Cures: most athlete's foot and ringworm, and it is the only one of the four with a prevention claim, helps prevent most athlete's foot with daily use, at to prevent athlete's foot, apply once or twice daily (morning and/or night). Regimen: four weeks. Not checked: the same three.

Best athlete's foot cream is, on this page, answered by matching: the label that covers the part of your foot that is affected, used for the number of weeks that label states.

When this is a dermatologist's question

At the label's own trigger, which is no improvement in four weeks for three of the four. When the nails are involved, since none of these creams reaches them. When the sole is thick and scaly and treatment is not working, which may be the wrong diagnosis rather than the wrong cream. When it recurs despite the prevention list. And for anyone with diabetes, where a break in the skin of the foot is not a shelf problem, as cracked heels sets out.

Past the topicals, DermNet notes that For those who do not respond to topical therapy, an oral antifungal agent may be needed for a few weeks, naming terbinafine, itraconazole, fluconazole and griseofulvin. Those are prescriptions, and nothing here describes how they are used. When to see a dermatologist covers how to get seen.

The four labels, side by side

Product	Active	What the label says it cures	Regimen on the label	Stop and ask a doctor
Lamisil AT Cream	Terbinafine 1%	Most athlete's foot (tinea pedis)	Between the toes: twice a day, 1 week. Bottom or sides: twice a day, 2 weeks	Too much irritation, or no improvement after 4 weeks
Lotrimin Ultra	Butenafine 1%	Most athlete's foot between the toes; sole and sides unknown	Between and around the toes: twice a day for 1 week, or once a day for 4 weeks	Too much irritation, or no improvement after 4 weeks
Lotrimin AF	Clotrimazole 1%	Most athlete's foot, jock itch, ringworm	Twice daily; 4 weeks for athlete's foot	Irritation, or no improvement within 4 weeks
Tinactin	Tolnaftate 1%	Most athlete's foot and ringworm; also prevention with daily use	Twice daily, 4 weeks; to prevent, once or twice daily	Irritation, or no improvement within 4 weeks

FAQ

How long do you use athlete's foot cream? As long as its own label says, which is one week to four weeks depending on the product and, for one of them, on where the infection is. Lamisil AT says one week between the toes and two weeks on the bottom or sides; Lotrimin Ultra says one week twice daily or four weeks once daily between the toes; clotrimazole and tolnaftate creams say four weeks. None says to stop when the itching stops.

Terbinafine or clotrimazole? Their labels differ in time: one week versus four for an infection between the toes. That is a labeling fact rather than a ranking, and DermNet lists both classes without preferring either, giving two to four weeks as the typical course.

What about athlete's foot on the bottom of the foot? Read the box. Lamisil AT gives the sole its own two-week course; Lotrimin Ultra says effectiveness there is unknown; the clotrimazole and tolnaftate labels make no site distinction. A thick, scaly sole is also the pattern most often mistaken for dry, cracked skin, so it is worth being sure it is fungal.

Why does my athlete's foot keep coming back? DermNet names four causes: reinfection, an untreated fungal nail infection, an untreated family member, or a different diagnosis. None of them is solved by a stronger cream.

Can these creams treat a fungal toenail? No. The clotrimazole label says it is not effective on the scalp or nails, and the terbinafine label says do not use on nails.

Is there a cream that prevents athlete's foot? Tinactin's label carries a prevention claim, with daily use. The rest of prevention is the list DermNet gives: dry feet, dry shoes, sandals on communal floors, powder, and clean floors.

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The aisle sells four tubes that look alike and carry different numbers. Pick by where the infection is, follow that label's weeks rather than your own sense of when it cleared, do the drying and the shoes at the same time, and if it comes back, read DermNet's four reasons before buying a fifth tube.

Sources

• Tinea pedis (fungal foot infection), DermNet
• Lamisil AT Cream, terbinafine hydrochloride 1%, Drug Facts, DailyMed
• Lotrimin Ultra Athlete's Foot, butenafine hydrochloride 1%, Drug Facts, DailyMed
• Clotrimazole 1% athlete's foot cream, Drug Facts, DailyMed
• Tinactin Antifungal Cream, tolnaftate 1%, Drug Facts, DailyMed