By Medically reviewed by hellodoktor

Generic Name: Mycostatin Brand Name(s): Mycostatin and Mycostatin.


What is Mycostatin® (nystatin) used for?

Mycostatin® is an antifungal. It works by weakening cell membranes of the sensitive fungus. This allows the cell contents to leak out and results in death of the fungus.

Mycostatin® is commonly used for the treatment of fungal infections of the stomach, intestines, and mucous membranes.

It may also be used for other conditions, ask your doctor for more information.

How should I take Mycostatin® (nystatin)?

Use Mycostatin® as directed by your doctor. Check the label on the medicine for exact dosing instructions.

Take Mycostatin® by mouth with or without food. Mycostatin® works best if it is taken at the same time every day.

To clear up your infection completely, take Mycostatin® for the full course of treatment. Keep taking it even if you feel better in a few days.

How do I store Mycostatin® (nystatin)?

Mycostatin® is best stored at room temperature away from direct light and moisture. To prevent drug damage, you should not store Mycostatin® in the bathroom or the freezer. There may be different brands of Mycostatin® that may have different storage needs. It is important to always check the product package for instructions on storage, or ask your pharmacist. For safety, you should keep all medicines away from children and pets.

You should not flush Mycostatin® down the toilet or pour them into a drain unless instructed to do so. It is important to properly discard this product when it is expired or no longer needed. Consult your pharmacist for more details about how to safely discard your product.

Precautions & warnings

What should I know before using Mycostatin® (nystatin)?

Before using this drug, tell your doctor if:

  • You are allergic to any ingredient in Mycostatin®.
  • You are pregnant, planning to become pregnant, or are breastfeeding.
  • You are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement.
  • You have allergies to medicines, foods, or other substances.

Practice good oral hygiene, including proper care of dentures, while you are taking Mycostatin®.

Be sure to use Mycostatin® for the full course of treatment. If you do not, the medicine may not clear up your infection completely.

Is it safe during pregnancy or breastfeeding?

There are no adequate studies in women for determining risk when using Mycostatin® during pregnancy or while breastfeeding. Please always consult with your doctor to weigh the potential benefits and risks before taking Mycostatin®. Mycostatin® is pregnancy risk category C, according to the US Food and Drug Administration (FDA).

FDA pregnancy risk category reference below:

  • A=No risk
  • B=No risk in some studies
  • C=There may be some risk
  • D=Positive evidence of risk
  • X=Contraindicated
  • N=Unknown

Side effects

What side effects can occur from Mycostatin® (nystatin)?

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most common side effects persist or become bothersome:

Seek medical attention right away if any of these severe side effects occur:

  • Rash
  • Hives
  • Itching
  • Difficulty breathing
  • Tightness in the chest
  • Swelling of the mouth, face, lips, or tongue

Not everyone experiences these side effects. There may be some side effects not listed above. If you have any concerns about a side-effect, please consult your doctor or pharmacist.


What drugs may interact with Mycostatin® (nystatin)?

Mycostatin® may interact with other drugs that you are currently taking, which can change how your drug works or increase your risk for serious side effects. To avoid any potential drug interactions, you should keep a list of all the drugs you are using (including prescription drugs, nonprescription drugs and herbal products) and share it with your doctor and pharmacist. For your safety, do not start, stop, or change the dosage of any drugs without your doctor’s approval.

Does food or alcohol interact with Mycostatin® (nystatin)?

Mycostatin® may interact with food or alcohol by altering the way the drug works or increase the risk for serious side effects. Please discuss with your doctor or pharmacist any potential food or alcohol interactions before using this drug.

What health conditions may interact with Mycostatin® (nystatin)?

Mycostatin® may interact with your health condition. This interaction may worsen your health condition or alter the way the drug works. It is important to always let your doctor and pharmacist know all the health conditions you currently have.


The information provided is not a substitute for any medical advice. You should ALWAYS consult with your doctor or pharmacist before using Mycostatin® (nystatin).

What is the dose of Mycostatin® (nystatin) for an adult?

Oral thrush

The recommended dose is 400,000 to 600,000 units of the oral suspension, orally 4 times a day.

Duration of therapy: at least 48 hours after symptoms have disappeared and cultures demonstrate eradication.

Intestinal candidiasis

Oral tablets: The recommended dose is 500,000-1,000,000 units of the tablet formulation, orally 3 times a day.

Duration of therapy: at least 48 hours after clinical cure.

What is the dose of Mycostatin® (nystatin) for a child?

1 month to 12 months

The recommended dose is 200,000 units of the oral suspension, orally q6hr (100,000 units in each side of mouth).

1 year to 18 years

The recommended dose is 400,000-600,000 units of the oral suspension, orally q6hr; swish in mouth several minutes and then swallow.

Duration of therapy: at least 48 hours after symptoms have disappeared and cultures demonstrate eradication.

How is Mycostatin® (nystatin) available?

Mycostatin® is available in the following dosage forms and strengths:

  • Oral powder: 100,000units/g
  • Oral suspension: 100,000units/ml
  • Oral tablet: 500,000units
  • Capsule: 500,000units, 1,000,000units

What should I do in case of an emergency or overdose?

In case of an emergency or an overdose, call your local emergency services or go to your nearest emergency room.

What should I do if I miss a dose?

If you miss a dose of Mycostatin®, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and take your regular dose as scheduled. Do not take a double dose.

Hello Health Group does not provide medical advice, diagnosis or treatment.


Review Date: March 25, 2017 | Last Modified: September 12, 2019

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