Nystatin is a polyene antifungal antibiotic obtained from Streptomyces nursei. The molecular formula for Nystatin is C₄₇H₇₅NO₁₇. The molecular weight of Nystatin is 926.1.

Structural formula:

Nystatin Topical Powder USP is for dermatologic use.

Nystatin Topical Powder USP contains 100,000 USP nystatin units per gram dispersed in talc.

Last updated on RxList: 11/26/2008

Nystatin Topical Powder is indicated in the treatment of cutaneous or mucocutaneous mycotic infections caused by Candida albicans and other susceptible Candida species.

This preparation is not indicated for systemic, oral, intravaginal or ophthalmic use.

Very moist lesions are best treated with the topical dusting powder.

Adults and Pediatric Patients (Neonates and Older):

Apply to candidal lesions two or three times daily until healing is complete. For fungal infection of the feet caused by Candida species, the powder should be dusted on the feet, as well as, in all foot wear.

Nystop®Nystatin Topical Powder USP is supplied as 100,000 units nystatin per gram in 15 g, 30 g and 60 g plastic squeeze bottles.

(NDC 0574-2008-15)
(NDC 0574-2008-30)
(NDC 0574-2008-02).

Storage

Store at controlled room temperature 15°-30°C (59°-86°F); avoid excessive heat (40°C;104°F).

PADDOCK LABORATORIES, INC., Minneapolis, MN 55427. (07-03). FDA revision date: 11/13/2002

Last updated on RxList: 11/26/2008

The frequency of adverse events reported in patients using nystatin topical preparations is less than 0.1%. The more common events that were reported include allergic reactions, burning, itching, rash, eczema, and pain on application.(See PRECAUTIONS: General.)

No information provided.

Last updated on RxList: 12/4/2008

No information provided.

General

Nystatin Topical Powder should not be used for the treatment of systemic, oral, intravaginal or ophthalmic infections.

If irritation or sensitization develops, treatment should be discontin-ued and appropriate measures taken as indicated. It is recommended that KOH smears, cultures, or other diagnostic methods be used to confirm the diagnosis of cutaneous or mucocutaneous candidia-sis and to rule out infection caused by other pathogens.

Laboratory Tests

If there is a lack of therapeutic response, KOH smears, cultures, or other diagnostic methods should be repeated.

Carcinogenesis, Mutagenesis, Impairment of Fertility

No long-term animal studies have been performed to evaluate the carcinogenic potential of nystatin. No studies have been performed to determine the mutagenicity of nystatin or its effects on male or female fertility.

Pregnancy: Teratogenic Effects

Category C. Animal reproduction studies have not been conducted with any nystatin topical preparation. It also is not known whether these preparations can cause fetal harm when used by a pregnant woman or can affect reproductive capacity. Nystatin topical prepara-tions should be prescribed for a pregnant woman only if the potential benefit to the mother out-weighs the potential risk to the fetus.

Nursing Mothers

It is not known whether nystatin is excreted in human milk. Caution should be exercised when nystatin is prescribed for a nursing woman.

Pediatric Use

Safety and effectiveness have been established in the pediatric pop-ulation from birth to 16 years.

(See DOSAGE AND ADMINISTRATION).

Last updated on RxList: 12/4/2008

No information provided.

Nystatin Topical Powder is contraindicated in patients with a history of hypersensitivity to any of its components.

Last updated on RxList: 11/26/2008

Pharmacokinetics

Nystatin is not absorbed from intact skin or mucous membrane.

Microbiology

Nystatin is an antibiotic which is both fungistatic and fungicidal in vitro against a wide variety of yeasts and yeast-like fungi, including Candida albicans, C. parapsilosis, C. tropicalis, C. guilliermondi, C. pseudotropicalis, C. krusei, Torulopsis glabrata, Tricophyton rubrum, T.mentagrophytes.

Nystatin acts by binding to sterols in the cell membrane of susceptible species resulting in a change in membrane permeability and the subsequent leakage of intracellular components. On repeated sub-culturing with increasing levels of nystatin, Candida albicans does not develop resistance to nystatin. Generally, resistance to nystatin does not develop during therapy. However, other species of Candida (C, tropicalis, C.guillier mondi, C.krusei, and C.stellatoides) become quite resistant on treatment with nystatin and simultaneously become cross resistant to amphotericin as well. This resistance is lost when the antibiotic is removed. Nystatin exhibits no appreciable activity against bacteria, protozoa, or viruses.

Last updated on RxList: 11/26/2008

1. Patients using this medication should receive the following informa-tion and instructions:
2. The patient should be instructed to use this medication as directed (including the replacement of missed doses). This medication is not for any disorder other than that for which it is prescribed.
3. Even if symptomatic relief occurs within the first few days of treat-ment, the patient should be advised not to interrupt or discontinue therapy until the prescribed course of treatment is completed.

If symptoms of irritation develop, the patient should be advised to notify the physician promptly.

Last updated on RxList: 11/26/2008

IMPORTANT NOTE: This is a summary and does not contain all possible information about this product. For complete information about this product or your specific health needs, ask your health care professional. Always seek the advice of your health care professional if you have any questions about this product or your medical condition. This information is not intended as individual medical advice and does not substitute for the knowledge and judgment of your health care professional. This information does not contain any assurances that this product is safe, effective, or appropriate for you.

NYSTATIN POWDER - TOPICAL

(NYE-stat-in)

COMMON BRAND NAME(S): Nystop, Pedi-dri

USES: Nystatin is used to treat fungal skin infections. Nystatin is an antifungal that works by stopping the growth of fungus.

HOW TO USE: Use this medication on the skin only. Clean and thoroughly dry the area to be treated. Apply this medication to the affected skin, usually twice a day or as directed by your doctor. Dosage and length of treatment depends on the type of infection being treated. Do not apply this more often than prescribed.

Apply enough powder to lightly coat the affected area and some of the surrounding skin. After applying this medication, wash your hands unless you are using this medication to treat the hands. Do not wrap, cover or bandage the area unless directed to do so by your doctor. If used in the diaper area on an infant, do not use tight-fitting diapers or plastic pants.

Do not apply this medication in the eyes, nose, mouth, or vagina.

Use this medication regularly in order to get the most benefit from it. Remember to use it at the same times each day.

Continue to use this medication until the full prescribed amount is finished, even if symptoms disappear after starting nystatin. Stopping the medication too early may allow the fungus to continue to grow, which may result in a return of the infection.

Inform your doctor if your condition persists after 2 weeks of treatment or worsens at any time.

SIDE EFFECTS: Skin irritation or redness may occur. If either of these effects persist or worsen, notify your doctor or pharmacist promptly.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

A very serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction may include: rash, itching, swelling, severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

Contact your doctor for medical advice about side effects. The following numbers do not provide medical advice, but in the US you may report side effects to the Food and Drug Administration (FDA) at 1-800-FDA-1088. In Canada, you may call Health Canada at 1-866-234-2345.

PRECAUTIONS: Before using nystatin, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies.

Before using this medication, tell your doctor or pharmacist your medical history.

This medication should be used only if clearly needed during pregnancy. Discuss the risks and benefits with your doctor.

It is not known whether this drug passes into breast milk. Consult your doctor before breast-feeding.

DRUG INTERACTIONS: Your healthcare professionals (e.g., doctor or pharmacist) may already be aware of any possible drug interactions and may be monitoring you for it. Do not start, stop or change the dosage of any medicine before checking with them first.

Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use.

Keep a list of all your medications with you, and share the list with your doctor and pharmacist.

OVERDOSE: This medicine may be harmful if swallowed. If swallowing or overdose is suspected, contact your local poison control center or emergency room immediately. US residents can call the US national poison hotline at 1-800-222-1222. Canadian residents should call their local poison control center directly. Symptoms that may occur after swallowing include: nausea, vomiting or stomach upset.

NOTES: Do not share this medication with others.

This medication should be used for your current condition only. Do not use it later for another infection unless told to do so by your doctor. A different medication may be necessary in those cases.

MISSED DOSE: If you miss a dose, use it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.

STORAGE: Store at room temperature between 59-86 degrees F (15-30 degrees C) away from light and moisture. Do not store in the bathroom. Keep all medicines away from children and pets.

Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company for more details about how to safely discard your product.

Information last revised July 2008 Copyright(c) 2008 First DataBank, Inc.