Mouthwash, also called mouthrinse, can be a good boost to a daily oral healthcare routine. While it never replaces daily brushing and flossing, rinsing does reach areas difficult for a toothbrush. 

But do you really need mouthwash? Maybe not, said Dr. John Safar, clinical faculty in comprehensive dentistry at Texas A&M University College of Dentistry in Dallas. 

“Those with excellent oral health don’t necessarily need a mouthwash if plaque is well controlled and they have no other oral health issues,” he said. “But some rinses can help re-mineralize enamel and protect against cavities.”  

If you are unsure, ask your dentist. 

To fight against gingivitis and reduce plaque, choose a therapeutic mouthwash with cetylpyridinium chloride or essential oils; all are chemical compounds that kill bacteria. It’s found in many over-the-counter products, but dentists also prescribe mouthwashes with chlorhexidine for bad breath to target the volatile sulfur compounds and to guard against tooth decay. 

“Dentists can prescribe rinse formulations that ease pain from oral lesions,” Safar said. “They also suggest hydrogen peroxide to brighten smiles or to mimic saliva to help lubricate oral tissues and improve comfort.” 

Children under 6 years old shouldn’t use mouthwash unless directed by their dentists. Their swallowing reflexes aren’t fully developed, according to the American Dental Association. A small swig usually isn’t a cause for alarm and generally won’t bring side effects but seek medical attention if a child drinks a large amount or if you’re unsure how much was ingested. 

“Stay calm and check the bottle’s label for alcohol, fluoride and antimicrobial ingredients that could irritate small stomachs,” Safar said. “If your child shows signs of intoxication, is nauseous or drowsy, seek immediate emergency medical treatment.”  

Alcohol-free rinses also are usually gentler, making them good choices for those with sensitive gums, dry mouths or an aversion to “the mouthwash burn.” 

Mouthwashes with alcohol are usually more effective against oral bacteria. Their essential oils help reduce plaque and gingivitis. 

Timing also matters, Safar said.  

“Avoid using mouthwash immediately after brushing, as it can wash away the protective benefits left behind by your toothpaste,” he said. “Waiting also ensures that the ingredients in both products don’t interfere with each other’s effectiveness.”