Swish And Spit Or Swish And Swallow Nystatin Suspension?

In our latest question and answer, the pharmacist discusses if you should spit or swallow nystatin suspension.

3 min read Updated Jun 2026 Read by 34,405 people
Swish And Spit Or Swish And Swallow Nystatin Suspension?
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Will Nystatin suspension work with swish and spit for thrush? Also, how long do you hold Nystatin in the mouth for?

Sep 30, 2022
The quick answer
  • Nystatin suspension for oral thrush should be swallowed rather than spit out to ensure the medication contacts all affected areas of the mouth and throat.
  • You should swish the nystatin in your mouth for at least one to two minutes, dividing each dose between both sides of your mouth, before swallowing.
  • Avoid eating or drinking for about 30 minutes after using nystatin so the medication can stay in contact with the affected areas.
A quick summary of Dr. Brian Staiger, PharmD's full answer below, condensed by AI from that answer only (not from any outside source). The pharmacist's answer is the source of record.
Medications in this answer — tap to explore

Answer

Thanks so much for reaching out to us, and great question!

What Is Nystatin?

Nystatin is an antifungal drug used for a number of indications, including:

  • Intestinal candidiasis (overgrowth of the Candida yeast in the small and large intestines)
  • Cutaneous and mucocutaneous candidiasis, including candidal diaper dermatitis (skin fungal infection)
  • Oropharyngeal candidiasis (thrush)

Your question concerns using Nystatin for an oral fungal infection (thrush).

How Is Nystatin Dosed For Thrush?

Nystatin suspension should be dosed at 400,000 to 600,000 units (4 to 6 mL), swished in the mouth four times daily (every 6 hours or so), for at least one to two minutes for 7 to 14 days. Each dose should be divided so that one-half of each dose is placed in each side of the mouth. This ensures all the affected areas have been reached. Continue treatment for at least 48 hours after symptoms are resolved.

It is also important to not eat or drink for about 30 minutes after using nystatin. This allows the drug to remain in contact with the affected areas, and not be washed away prematurely.

Do You Spit Or Swallow Nystatin Suspension?

Getting to your question here, nystatin suspension can be spit or swallowed but, it is most commonly recommended to be swallowed, which is best practice.

An oral thrush infection can be present in many different parts of the mouth, as well as in the back of the mouth, the throat and esophagus. If you spit out nystatin, there is a chance that all the affected areas won't come into contact with the antifungal, which is vital for it to work. Swallowing nystatin ensures all the affected areas come into contact with the drug.

The prescribing information for nystatin specifically states to swallow:

CHILDREN AND ADULTS: 4–6 mL (400,000 to 600,000 units) four times daily (one-half of dose in each side of mouth). The preparation should be retained in the mouth as long as possible before swallowing.

Nystatin is generally a very well tolerated drug, even when swallowed. The drug is very poorly absorbed and almost the entire dose you take is excreted in feces, unchanged. It may cause mild side effects, such as nausea, vomiting, diarrhea and upset stomach, but that generally is the extent of it.

In terms of how long to swish nystatin before swallowing, you should swish it around for at least one to two minutes. Generally, the longer the better, but more than a few minutes isn't necessary as long as you consistently dose four times daily, for 7 to 14 days.

Final Words

Thanks again for your question and I hope this helped!

References & sources
  1. Nystatin Prescribing Information — AccessFDA
  2. Comparison of fluconazole and nystatin oral suspensions for treatment of oral candidiasis in infants — PubMed
  3. Nystatin Monograph — PubChem
Glossary — Terms in This Answer
Antifungal
A medication that kills or stops the growth of fungal infections.
Candidiasis
An infection caused by overgrowth of Candida yeast.
Candida
A type of yeast that can cause infections in various parts of the body.
Oropharyngeal candidiasis
A fungal infection of the mouth and throat, commonly called thrush.
Thrush
A fungal infection in the mouth caused by Candida yeast.
Mucocutaneous
Relating to both the skin and the moist tissue lining the inside of the mouth and other body openings.
Esophagus
The tube that connects the mouth to the stomach.
Absorbed
Taken up by the body through the digestive system or skin into the bloodstream.
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Dr. Brian Staiger, PharmD
About the pharmacist

Dr. Brian Staiger, PharmD

Clinical Pharmacy

Doctor of Pharmacy, board certified clinical pharmacist (BCPS), American Herbalist Guild, Medication Therapy Management certified

Brian Staiger, PharmD, BCPS, is a licensed pharmacist with more than 13 years of experience across retail pharmacy, clinical pharmacy, medication safety, pharmacy program development, and healthcare administration. He is the founder of HelloPharmacist.com, where he helps patients...

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