Nystatin drug information

DOSAGE AND ADMINISTRATION Nystatin Ointment Adults and Pediatric Patients (Neonates and Older): Apply liberally to affected areas twice daily or as indicated until healing is complete.

CONTRAINDICATIONS Nystatin ointment is contraindicated in patients with a history of hypersensitivity to any of their components.

ADVERSE REACTIONS The frequency of adverse events reported in patients using nystatin ointment 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. )

DESCRIPTION Nystatin is a polyene antifungal antibiotic drug obtained from Streptomyces nursei. Structural formula: Molecular formula : C 47 H 75 NO 17 Molecular weight : 926.09 g/mol Nystatin ointment is for dermatologic use. Nystatin ointment for topical use contains 100,000 USP nystatin units per gram in an ointment base of light mineral oil and white petrolatum. Image Table text from source: | Molecular formula | : | C47H75NO17 | Molecular weight | : | 926.09 g/mol

CLINICAL PHARMACOLOGY 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 subculturing with increasing concentrations 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. guilliermondi, 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.

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 subculturing with increasing concentrations 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. guilliermondi, 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.

PRECAUTIONS General Nystatin ointment should not be used for the treatment of systemic, oral, intravaginal or ophthalmic infections. If irritation or sensitization develops, treatment should be discontinued 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 candidiasis and to rule out infection caused by other pathogens.

INFORMATION FOR PATIENTS Patients using these medications should receive the following information and instructions: 1. The patient should be instructed to use these medications as directed (including the replacement of missed doses). These medications are not for any disorder other than that for which they are prescribed. 2. Even if symptomatic relief occurs within the first few days of treatment, the patient should be advised not to interrupt or discontinue therapy until the prescribed course of treatment is completed. 3. If symptoms of irritation develop, the patient should be advised to notify the physician promptly. 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 preparations should be prescribed for a pregnant woman only if the potential benefit to the mother outweighs 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 population from birth to 16 years. See DOSAGE AND ADMINISTRATION

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 preparations should be prescribed for a pregnant woman only if the potential benefit to the mother outweighs 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 population from birth to 16 years. See DOSAGE AND ADMINISTRATION

HOW SUPPLIED Nystatin ointment USP, 100,000 units per gram is a pale yellow to yellow color ointment available as follows: NDC 13668-534-01 15 gram tube NDC 13668-534-02 30 gram tube STORAGE Store at 20° to 25°C (68° to 77°F); excursions permitted between 15°C and 30°C (59°F and 86°F) [see USP Controlled Room Temperature]. Manufactured by: Torrent Pharmaceuticals LTD., Pithampur-454775, INDIA . Manufactured for: Torrent Pharma INC., Basking Ridge, NJ 07920 8102492 Revised: March 2026 Image