In the news....
By MARY DUNWALD
Read about a natural alternative to drugs - Toenail Fungus Drops
But television commercials for Lamisil, a toenail cure, now feature yellow fungus monsters yucking it up under the nail of a big toe, and larger-than-life pictures of rotting toenails appear in magazine advertisements for Penlac, another treatment.
For the most part, toenail fungus is repugnant but not medically alarming; doctors say most people who seek treatment for the problem do so out of disgust. Yet for some, especially the elderly or those with diabetes, it may lead to other infections. And even in healthy people, the condition can be painful.
Yet treating the infection takes many weeks and is not always successful. A complete cure, when it is achieved, takes a year, the amount of time required for the infected nail to grow out completely. And the process is expensive. Fungus medications can cost up to several hundred dollars for a single course of treatment, and many health insurers do not cover them.
The medical term for toenail fungus is onychomycosis (on-ee-ko-me-KO-sis). The infection is caused by the same types of fungi that cause athlete's foot, and the two often occur together.
About 20 percent of people have toenail fungus, researchers have found, and the likelihood of getting it increases with age, rising to about 40 percent by age 70. The fungi themselves are everywhere - not only in locker rooms, hotel rooms and other public places but also in most people's homes.
Toe fungus tends to run in families, because people inherit a vulnerability to it. Onychomycosis can occur under the fingernails, but it is far more common in toes, doctors say, because the feet are more often subject to the dark, warm, moist conditions that fungi favor.
Smoking raises the risk of toenail infection, by restricting
circulation to the feet. So does diabetes, which also impairs circulation.
Using polish on the nails does not invite or intensify the infection,
Over-the-counter antifungal creams are safe and help some people with mild infections, said Dr. Lloyd S. Smith, a podiatrist in Newton, Mass. Some treatments contain tea tree oil, an antifungal substance derived from an Australian plant. But in some cases, nonprescription treatments are not powerful enough, he claims.
One prescription medication, ciclopirox, a topical treatment marketed by Aventis as Penlac, is painted on like nail polish. Patients are instructed to apply it to infected nails each evening before bed. Once a week, they are to take off the accumulated layers with rubbing alcohol.
But treatment with Penlac takes 48 weeks, and a month's supply costs more than $100. In addition, studies suggest that ciclopirox is effective in combating the infection in less than half of all cases, and results in a total cure in fewer than 10 percent.
Terbinafine, marketed by Novartis as Lamisil, may be the best-known prescription treatment for toenail fungus, thanks to the company's monster-filled commercials. Patients take one 250-milligram tablet a day for 12 weeks. After that, the medicine continues to work for a few months.
Terbinafine helps about 2 out of 3 people who take it, doctors say, but it cures the infection in only 38 percent of cases, according to the package insert. Lamisil costs more than $8 per pill, and a complete course of treatment can cost about $700.
In some cases, although considered rare, the drug has been linked to liver failure and death, and so the Food and Drug Administration has advised doctors to monitor liver function in patients taking it.
People with liver problems should not take Lamisil. Studies have not been done to determine whether the drug is safe for children and pregnant women. Nursing mothers are also advised to avoid it.
Another treatment in pill form is itraconazole, marketed by Janssen as
Sporanox. It is typically taken twice a day for one week out of four. This
cycle is repeated three or four times. A one-week supply costs about $100.
Itraconazole is somewhat less effective than terbinafine. It, too, has
been linked in rare cases with liver failure, as well as with congestive
In the most difficult and painful cases, doctors remove the toenail to
help kill the infection. But given the cost, the risks and the time
involved in treatment, experts say it is better to try to avoid infection
in the first place - by treating athlete's foot infections as soon as they
arise, for example, and by keeping the toes ventilated and clean.
All trademarked names are owned by their respective owners.