Amorolfine and Onychomycosis (Nail Fungus)
Saturday, April 28th, 2012Fungal infection of the nails, called onychomycosis, is very common but difficult to treat. There is still no guaranteed way to cure the infection, no matter what treatment is chosen, but there are a number of ways to improve the appearance of the nails, lessen the infection, and perhaps cure it in some people. While there is a lot of agreement between medical professionals who treat this all over the world, the same medicines are not always available in different countries.

The two types of medical treatment are topical, medication applied directly to the affected nail or nails, or oral, taking medicine by mouth so it will get to the nail via the bloodstream. Oral medications usually have to be taken for 12 weeks, and achieve a “cure” from 60% to 75% of the time. However, these drugs have side effects including the potential for liver damage. Recurrence is common, from 10% to 50% of the time. Recurrence may be less likely if topical medicine is used on the nails; using both oral and topical medication may also improve the chance of eliminating the infection.
Oral medications are not able to actually kill all the fungus in infected nails, even if they can in the laboratory. The same thing can be said about topical medications. One idea is to combine the two to kill as many fungi as possible. For toenails, this must always be done along with cutting off as much infected nail as possible.
There are no FDA approved over-the-counter treatments available in the United States. There are creams made to treat athlete’s foot (a fungal infection of the skin) that can be used on toenails with varying success. These included Lamisil® (terbinafine), Nizoral® (ketoconazole), Mycelex® (clotrimazole), and Naftin® (naftifine), which are available without a prescription as well as with a prescription. The prescription medications are usually stronger. There are a couple of choices of topical medications FDA approved for fungal infection of the nails in the United States. These include ciclopirox lacquer (Penlac®) and tolnaftate 1% solution (called Formula 3).
A medicine used in many other parts of the world for the last 20 years is called amorolfine (trade name Loceryl®). It seems to be as safe and effective, if not more so, than the topical medications approved for use here. However, it is not FDA approved, and cannot be acquired in the United States or Canada. There are studies of its effectiveness and safety available because it is in use in Europe, the UK, and other places such as Australia. It can be ordered from other parts of the world.
Amorolfine is a different class of antifungal medication than the other topical drugs. It is active against essentially all the main classes of fungus that infect nails. Fungi called dermatophytes (meaning they like skin and skin structures like nails) are the most common causes of the infection. There are a few other fungi and mold that can cause onychomycosis and amorolfine can kill or stop these from growing in a laboratory setting. It works by damaging the membrane around the fungal cells. This kills dermatophytes like Trichophyton rubrum, the most common fungus involved. However, it does not always kill all the fungus in nails because it is very hard for it to reach every area of infection.
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