Povidone-Iodine: uses, dosing, side effects & brands

How Betadine is dosed

From the FDA label for Betadine (application NDA018634). Other povidone-iodine products — different forms, different strengths — are dosed differently. Follow the label for the one you were prescribed.

While the inner surface and contents of the immediate container (i.e. bottle) are sterile, the outer surface of the bottle is not sterile. The use of the bottle in a sterile field should be avoided. BETADINE* 5% Sterile Ophthalmic Prep Solution is used as follows: BETADINE* 5% Sterile Ophthalmic Prep Solution is used as follows: Make sure container is intact before use. To open, COMPLETELY TWIST OFF TAB, do not pull off. Gently pour entire contents of bottle into a sterile prep cup. Saturate sterile cotton-tipped applicator to prep lashes and lid margins using one or more applicators per lid; repeat once. Saturate sterile prep sponge or other suitable material to prep lids, brow and cheek in a circular ever-expanding fashion until the entire field is covered; repeat prep three (3) times. While separating the lids, irrigate the cornea, conjunctiva and palpebral fornices with BETADINE* 5% Sterile Ophthalmic Prep Solution using a sterile bulb syringe. After the BETADINE* 5% Sterile Ophthalmic Prep Solution has been left in contact for two minutes, sterile saline solution in a bulb syringe should be used to flush the residual prep solution from the cornea, conjunctiva, and the palpebral fornices.

Betadine side effects

Who shouldn’t take Betadine

How long povidone-iodine keeps

No povidone-iodine label we read sets a separate limit for after opening, but they do specify how it must be stored — and the stability behind any date assumes those conditions.

Povidone-Iodine and breastfeeding

From LactMed, the US National Library of Medicine’s Drugs and Lactation Database — quoted, not rewritten.

The use of povidone-iodine in the mother near term and during breastfeeding increases breastmilk iodine levels and can cause transient hypothyroidism in breastfed infants, especially in geographic areas that are iodine deficient. Maternal exposure to povidone-iodine near term can sometimes interfere with thyroid studies done as a part of newborn screening tests. Although iodine from povidone-iodine is minimally absorbed through intact adult skin, exposure of mothers who are or will be breastfeeding to povidone-iodine should be minimized by using lower concentrations of povidone-iodine, applying it to the smallest possible surface areas of the body, shortening contact time, and avoiding repeated applications. If povidone iodine is removed from the abdomen with alcohol within several minutes after its application for cesarean section delivery, it is absorbed into the bloodstream and excreted in breastmilk, but may not affect neonatal urinary iodine, TSH or FT4 during the perinatal period. Iodine absorption can be extensive with vaginal use; avoid douching with povidone iodine or use of iodine-containing tampons during breastfeeding. Iodine has not been measured in milk after the use of povidone-iodine nasal spray.

National Institute of Child Health and Human Development, record revised April 15, 2026. LactMed states its information is not a substitute for professional judgement.

What people report to the FDA about povidone-iodine

The FDA Adverse Event Reporting System (FAERS) collects reports from patients and clinicians. It holds 2,473 reports naming povidone-iodine, and the FDA flagged 94% of those reports as serious. The effects reported most often — leaving out reports about overdose, misuse or the condition being treated, which dominate the raw list for common medicines:

• endophthalmitis261 reports
• nausea214 reports
• rash186 reports
• drug hypersensitivity169 reports
• toxic anterior segment syndrome146 reports
• vomiting135 reports
• confusional state133 reports
• c-reactive protein increased131 reports

Source: openFDA drug/event (FAERS), retrieved August 26, 2026.

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