What is Chlorhexidine: Uses, Warnings & Interactions

Updated Aug 13, 2025  •  Published Dec 30, 2020

Chlorhexidine is a disinfectant commonly used in medicine. It’s in cleaners, soaps, catheters, wound dressings, surgical drapes, and many other products. Most patients encounter it as either an over-the-counter skin disinfectant or a prescription oral rinse. Chlorhexidine is poisonous and should never be swallowed or allowed to get in the eyes or ears.

Chlorhexidine overview

BRAND NAMES:

Avagard (hand wash), Hibiclens (skin cleanser), Dyna-Hex (skin cleanser), Peridex (oral rinse), PerioGard (oral rinse), Provon (hand wash), Purell Foam Handwash, Tegaderm CHG (dressing)

Generic Names:

  • Chlorhexidine gluconate

Uses:

  • Disinfecting the skin, wounds, or oral mucosa

Therapeutic Classes:

  • Disinfectant, antiseptic, antimicrobial, antiinfective

Forms:

  • Skin cleanser, oral rinse, wound dressing, cleaning liquid

How it’s taken:

  • Topically

What is Chlorhexidine used for?

Chlorhexidine is a powerful antiseptic used by medical facilities for a variety of purposes. Patients typically purchase chlorhexidine as an over-the-counter skin disinfectant, as prescription-only medicated wound dressings (usually after an injury, medical procedure, or at-home IV), or as a prescription oral rinse (usually for gingivitis or dental procedure aftercare).

What form(s) does Chlorhexidine come in

  • Skin cleanser/disinfectant (liquid/foam)

    • 0.5%

    • 0.75%

    • 1%

    • 2%

    • 4%

  • Oral rinse

    • 0.12%

What are common Chlorhexidine doses?

  • As a skin disinfectant: Wash the skin vigorously with 5 mL of liquid for 15 seconds and rinse

  • For wound care: Apply a minimum amount of product to the rinsed skin or wound area, wash gently, rinse

  • As an oral rinse: Rinse the mouth for 30 seconds after brushing twice daily (morning and evening)

Common Chlorhexidine prescriptions

  • Chlorhexidine Gluconate
    118ml of 0.12% bottle

  • Chlorhexidine Gluconate
    118ml of 4% bottle

  • Chlorhexidine Gluconate
    473ml of 0.12% bottle

  • Chlorhexidine Gluconate
    15ml of 0.12% cup

How to take Chlorhexidine

  • Follow all the prescriber’s instructions.

    • Chlorhexidine skin disinfectant may be prescribed before or after surgery. 

    • The clinic may send you home with chlorhexidine skin disinfectant or oral rinse. In some cases, you may need to fill a prescription at the pharmacy.

    • The clinic or prescriber may give you written instructions.

    • Use this product only at the times prescribed each day. Do not administer extra doses.

  • If using this product without a prescription, read and follow the package directions.

  • Use chlorhexidine skin wash only on the skin.

    • Do not get this product in the eyes, nose, or mouth.

    • Do not use chlorhexidine skin disinfectant on the face. 

    • Do not apply to large skin areas unless directed by a healthcare provider.

    • Apply chlorhexidine in a well-ventilated environment.

    • Rinse and thoroughly dry the skin before use.

    • Use 5 mL of liquid and wash the skin vigorously for 15 seconds.

    • Completely rinse the liquid off the skin.

  • Use chlorhexidine liquid on wounds with care.

    • Thoroughly rinse the area.

    • Apply only a minimal amount of chlorhexidine product to the wound or affected skin.

    • Wash the area gently.

    • Thoroughly rinse the area with water.

  • Use chlorhexidine foaming wash only on the hands and forearms.

    • Do not use it on any other skin area or for wound care.

    • Wet hands.

    • Use 5 mL of product and vigorously wash the skin for 15 seconds.

    • Rinse thoroughly with water.

  • Rinse the mouth twice daily (once in the morning, once in the evening) with chlorhexidine oral rinse.

    • Brush teeth first.

    • Use the measured dose cup to measure doses. 

    • Rinse the mouth with 15 mL of undiluted product for 30 seconds.

    • Spit out the rinse. Never swallow chlorhexidine oral rinse.

    • Do not rinse with water, use mouthwash, brush the teeth, drink liquid, or eat food immediately after using chlorhexidine oral rinse.

  • If you are sent home with chlorhexidine dressings, follow all the instructions from the doctor or clinic for applying dressings.

  • Store at room temperature in a closed container out of the reach of children. Do not expose chlorhexidine to excessive heat.

What to do if you miss a dose of Chlorhexidine

  • If chlorhexidine is being dosed on a schedule, take a missed dose when remembered.

  • If it is almost time for the next dose, skip the missed dose. Take the next dose at its regular time.

Chlorhexidine contraindications

  • Chlorhexidine products are not suitable for everyone.

  • Do not use chlorhexidine products if you have had an allergic reaction to chlorhexidine.

Chlorhexidine warnings

  • Talk to a healthcare provider if you are pregnant, nursing, or are using chlorhexidine on a child or adolescent.

    • Use chlorhexidine skin disinfectant carefully in premature infants or infants younger than 2 months of age.

    • Chlorhexidine oral rinse is not FDA-approved for use in children younger than 18 years of age.

  • Chlorhexidine is toxic.

    • Do not swallow chlorhexidine products.

    • Do not allow chlorhexidine solution to get into the eyes, ears, nose, or mouth.

    • Do not use chlorhexidine on the head or face.

    • Do not use chlorhexidine in the genital area.

    • Consult with a healthcare professional before using chlorhexidine on wounds that affect more than the superficial layer of the skin.

  • If chlorhexidine gets in the eyes or ears, immediately rinse it out thoroughly with water.

    • Chlorhexidine can cause permanent eye injury or deafness if it gets and stays in the eyes or ears.

  • Get medical attention or call a poison control center if a child swallows a chlorhexidine product.

    • Always supervise children when they are using topical chlorhexidine.

    • Symptoms of chlorhexidine exposure include stomach pain and nausea.

  • Stop using chlorhexidine and talk to a healthcare provider if you experience irritation or an allergic reaction.

  • Do not use chlorhexidine to treat active skin infections.

  • Chlorhexidine oral rinse can cause tooth staining, temporary taste changes, or, in rare cases, permanent taste alterations.

  • Chlorhexidine can stain fabrics. Do not bleach, or the stain will be permanent.

Chlorhexidine interactions

  • Chlorhexidine has no known drug interactions.

  • Get medical advice from a healthcare provider if you are using lotions, soaps, shampoos, or deodorants on the same skin areas as chlorhexidine.

Chlorhexidine side effects

Stop using chlorhexidine and contact a healthcare provider if you notice any signs of a possible serious side effect, including:

  • Allergic reactions: irritation, rash, hives, wheezing, trouble breathing, shock, facial swelling, low blood pressure, fatigue

Less serious side effects

  • Tooth discoloration (oral rinse)

  • Increased calculus formation (oral rinse)

  • Taste alterations (oral rinse)

  • Headache

Sources:

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