Can I Put Hydrogen Peroxide in My Waterpik?

By Ted Gerner | November 20, 2022

Hydrogen peroxide is a gentle disinfectant often applied to the skin to minimize sepsis from minor wounds, burns, and cuts. It can also be used as a mouthwash to loosen mucus and relieve mild lip discomfort.

Whenever it’s applied to the affected area, it releases oxygen. The bubbling is caused by oxygen production peeling off the top layer of skin and disinfecting the surface. Hydrogen peroxide should not be used to treat severe cuts, animal bites, or severe burns.

Can I Put Hydrogen Peroxide in My Waterpik?

If you know that peroxide is the key element in teeth whitening, you may be curious if you can use it in your Waterpik because it washes all over your gums.

Hydrogen peroxide rinses with low concentrations are harmless when you use them at home. So yes, you can put hydrogen peroxide in your Waterpik.

hydrogen peroxide molecule

How Much Peroxide to Use in Waterpik?

You can use a diluted 3% hydrogen peroxide mixture to rinse particles and dangerous microorganisms from your teeth and gums.

Keep the Waterpik straight. Open the Waterpik’s storage lid, located just below the base of the nozzle. Fill the tank halfway with lukewarm water. Fill the second half of the tank with 3% hydrogen peroxide.
Close the lid of the tank with a click. Press the on switch on top of the Waterpik and point the nozzle at your teeth. Using a 1:1 combination of 3% hydrogen peroxide and water, rinse the gums between your teeth for about 5 seconds per tooth.

Related reading: Can You Use A Waterpik To Clean Your Ears?

Benefits of Hydrogen Peroxide

One of the main benefits of rinsing with hydrogen peroxide is that it can reach hard-to-reach places in your mouth. The other benefits are listed below.

Protection against gingivitis

The antiseptic elements of hydrogen peroxide in your Waterpik improve your dental hygiene by helping to treat gum disease. Plaque consists of a sticky layer of bacteria called biofilm that builds up on your teeth. When you gargle with hydrogen peroxide or use it in your Waterpik, it produces oxygen that kills germs.

Helps with Sore Throat

Hydrogen peroxide can also treat a sore throat, which is beneficial for your dental health. Fungal infection is one of the reasons for sore throat. Rinsing with hydrogen peroxide can significantly reduce the irritation caused by the bacteria while helping to eliminate the symptoms.

Teeth Whitening

Hydrogen peroxide can also help whiten teeth. It’s usually found in many kinds of toothpaste and mouthwashes that are designed to whiten teeth. Rinsing with hydrogen peroxide can help whiten teeth, but it’s not as effective as using 10% carbamide peroxide gel.

Treating Gingivitis

Hydrogen peroxide could be an effective treatment option if you’ve sensitive gums that bleed and are often irritated or red, which are signs of gingivitis. When treating gingivitis, the gums must be rinsed regularly with a liquid that kills the bacteria that cause the disease. In this case, hydrogen peroxide is beneficial.

Cold Sores

Using hydrogen peroxide in your Waterpik can help you if you suffer from mouth ulcers. Hydrogen peroxide helps to kill germs, clean the surface and remove dead tissue. And this process may speed up the healing of a mouth ulcer or a small scratch in your mouth.

The Downsides of Hydrogen Peroxide

If you plan to buy hydrogen peroxide for your Waterpik, you should be aware of the possible adverse effects. Even though it’s not harmful, hydrogen peroxide has an unpleasant aftertaste. It can also irritate your mouth, with symptoms that may last for many hours.

Peroxide can sometimes dry your mouth, which is bad for your dental health. Saliva is needed to remove microorganisms from your mouth and remineralize tooth enamel. If you accidentally swallow the peroxide, you may feel dizzy or have a stomach upset while using your Waterpik.

What You Should Keep In Mind

Dilute hydrogen peroxide properly with water before using it as a mouthwash or adding it to your Waterpik.

Also, limit daily use to 1-2 weeks in the beginning and 3 days per week thereafter. Prolonged use of hydrogen peroxide increases the risk of free radical formation in saliva, which is also involved in precancerous tissue changes.

In addition, if the use of diluted hydrogen peroxide causes burning or inflamed gums, you should stop using it.

Related reading: Oral B Water Flosser Reviews & Buying Guide


Waterpik is a more sophisticated way to clean between and around your teeth.

Hydrogen peroxide can be a good idea if you’re focused on treating a specific oral problem or want to improve your overall dental health. However, don’t forget to check with your dentist before incorporating it into your routine.