Can Sensitive Toothpaste Cause Dry Mouth? 3 Culprits Highlighted!

Last Updated: 29 November 2023

Have you ever wondered, “Can sensitive toothpaste cause dry mouth?” If so, you’re not alone. Many of us use specialized oral care products without fully understanding their effects. This blog post aims to shed light on this important question. You will explore the relationship between sensitive toothpastes and the occurrence of dry mouth, a condition known as xerostomia.  

Understanding the impact of the products we use daily is crucial for maintaining not just oral health, but overall well-being. Join us as we delve into this topic, providing insights and answers to help you make informed decisions about your oral care routine. 

Understanding Sensitive Toothpaste  

Sensitive toothpaste is specifically formulated to alleviate pain and discomfort associated with dental sensitivity. This condition occurs when the dentin, the underlying layer of your teeth, becomes exposed due to receding gums or enamel wear. The exposure of dentin, which houses tiny tubes leading to the nerve center of the tooth, makes your teeth more susceptible to sensitivity. 

Key Ingredients in Sensitive Toothpaste  

The effectiveness of sensitive toothpaste lies in its key ingredients. Commonly, these include: 

Potassium Nitrate: This compound helps in desensitizing the nerve endings in the dentin. By blocking the transmission of pain signals from the surface of the tooth to the nerve, it reduces sensitivity. 

Strontium Chloride and Strontium Acetate: These agents block the tiny tubules in the dentin, providing a barrier against stimuli that cause sensitivity. 

Fluoride: Besides strengthening enamel and preventing tooth decay, fluoride also helps in reducing sensitivity. 

What is Dry Mouth (Xerostomia)?  

Dry mouth, or xerostomia, occurs when the salivary glands in your mouth don’t produce enough saliva to keep your mouth wet. Saliva is crucial not just for comfort but also for oral health, aiding in digestion, protecting teeth from decay, and preventing infection by controlling bacteria and fungi in the mouth. 

Symptoms of Dry Mouth  

The symptoms of dry mouth can include: 

  • A sticky, dry feeling in the mouth 
  • Frequent thirst 
  • Sores in the mouth, sores or split skin at the corners of the mouth, cracked lips 
  • A dry feeling in the throat
  • A burning or tingling sensation in the mouth and especially on the tongue 
  • A dry, red, raw tongue 
  • Problems speaking or trouble tasting, chewing, and swallowing 
  • Hoarseness, dry nasal passages, sore throat 
  • Bad breath 

Common Causes of Dry Mouth  

Dry mouth can be caused by various factors, including: 

  • Certain medications (such as antihistamines, decongestants, painkillers, diuretics, and others) 
  • Aging factors, including changes in the body’s ability to process medication, inadequate nutrition, and having long-term health problems 
  • Radiation therapy and chemotherapy for cancer 
  • Nerve damage to the head and neck area from an injury or surgery 
  • Conditions such as diabetes, stroke, yeast infection in your mouth (thrush), Alzheimer’s disease, or autoimmune diseases like Sjogren’s syndrome 

The Role of Oral Care Products in Dry Mouth  

Oral care products, including toothpaste and mouthwash, can sometimes contribute to dry mouth. Ingredients in some toothpastes, particularly those designed for sensitive teeth, may have properties that reduce saliva production or create a sensation of dryness. While these products are effective in reducing dental sensitivity, it’s important to understand their potential impact on saliva production. 

Can Sensitive Toothpaste Cause Dry Mouth? 

Yes, sensitive toothpaste may cause dry mouth.

Some ingredients in sensitive toothpaste, particularly Sodium Lauryl Sulfate (SLS), are known to reduce saliva production, which can lead to a feeling of dryness in the mouth. 

Dental professionals emphasize the importance of choosing the right toothpaste for your specific needs. While sensitive toothpaste is beneficial for reducing tooth sensitivity, dentists advise being mindful of its ingredients, especially if you are prone to dry mouth. They recommend looking for products that are specifically formulated to be gentle on the mouth or those that are free from SLS and alcohol.

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Analyzing the Ingredients of Sensitive Toothpaste: Potential Contributors to Dry Mouth  

Sensitive toothpaste is designed to alleviate pain associated with dental sensitivity, but some of its ingredients might contribute to dry mouth. Key components to consider include: 

Sodium Lauryl Sulfate (SLS)

Often used as a foaming agent, SLS can sometimes lead to a decrease in saliva production, contributing to dry mouth. 

A study published in the Swedish Dental Journal tried to analyze how different kinds of toothpaste affect the inside of a person’s mouth. They tested two types of toothpaste that both had an ingredient called sodium lauryl sulphate (SLS), but one also had another ingredient called betaine. They compared these to a toothpaste that didn’t have SLS, which is usually used for dry mouth.

They had 20 people in the study, and it was set up so neither the researchers nor the participants knew who was using which toothpaste. The participants put the toothpaste on the inside of their cheek and left it there for 15 minutes. The researchers then checked the health of the cheek area for 45 minutes. They used two methods: looking at it and measuring its electrical resistance.

They found that both toothpastes with SLS, whether with betaine or not, irritated the inside of the mouth similarly. The toothpaste with just betaine, meant for dry mouth, didn’t irritate the mouth. Adding betaine to the SLS toothpaste didn’t reduce its irritating effect. So, they concluded that toothpaste without SLS is better because it doesn’t irritate the mouth, unlike the ones with SLS. (1) 

A scoping review published on PubMed examined the side effects of SLS used in toothpastes. The review found that SLS could cause mucosal desquamation, irritation, inflammation of the oral mucosa or the tongue, ulcerations, and toxic reactions in the oral cavity. This suggests that SLS in toothpaste can have adverse effects on oral tissues, which might include contributing to dry mouth symptoms. (2)

Research from the British Dental Journal and NCBI highlighted by indicates that SLS could be an irritant to some patients’ mouths and may cause ‘oral mucosa peeling.’

This peeling or irritation could potentially lead to sensations of dry mouth, especially in individuals with sensitive oral mucosa or those prone to conditions like aphthous ulcers. It’s also noted that patients with dry mouth might benefit from using SLS-free toothpaste, as SLS can be too harsh for more sensitive mouths. (3)

A study conducted to assess the effects of SLS-containing and detergent-free toothpastes on symptoms of dry mouth found that a detergent-free, betaine-containing toothpaste was associated with relief of some symptoms of dry mouth.

This suggests that SLS might contribute to dry mouth symptoms, as the presence of SLS in toothpaste was less effective in relieving these symptoms compared to the SLS-free version. The study involved 27 xerostomic (dry mouth) patients and 18 healthy controls, using three types of mildly flavored toothpastes, including one with SLS and one without​. (4)

Potassium Nitrate

While effective in reducing sensitivity, there is no clear evidence that potassium nitrate can contribute to dry mouth.

A study published by the Journal of Periodontal Implant Sciences evaluated the effects of a mouthwash containing potassium nitrate, sodium fluoride, and cetylpyridinium chloride on dentin hypersensitivity found that it reduced hypersensitivity and gingival inflammation, but dry mouth was not specifically mentioned as a side effect. (5)

Another research by the Journal of Clinical and Experimental Dentistry evaluating the clinical efficacy of potassium nitrate in toothpaste and mouthwash for treating dentinal hypersensitivity also did not mention dry mouth as a side effect. (6)


Present in some formulations, alcohol can have a drying effect on the oral mucosa. 

Alcoholic ingredients in toothpaste can potentially contribute to dry mouth. The Oral Health Group mentions that alcohol-based mouth rinses can exacerbate symptoms of xerostomia (dry mouth), suggesting a possible link between alcohol in oral care products and increased mouth dryness. (7)

Additionally, Dental Insurance Insiders notes that toothpaste ingredients concentrated with alcohol could cause dry mouth, as they may rinse away enzymes that help to moisten the mouth. (8)

It’s important to consider the mechanism of how alcohol affects oral moisture. Alcohol, primarily containing ethanol, is known to negatively impact the salivary gland. After consumption, ethanol is converted to acetaldehyde, which adversely affects salivary secretion.

Research cited by SmartMouth indicates a significant decrease in salivary secretion following alcohol intake, and a reduction in the number of acinar cells, which are crucial for saliva production. (9)

Although these sources discuss alcohol in general rather than specifically in toothpaste, the underlying mechanism of how alcohol affects salivary glands could be relevant to alcohol-containing oral care products.

Therefore, it seems reasonable to consider that alcoholic ingredients in toothpaste could contribute to dry mouth, similar to the effects observed with alcohol consumption and alcohol-based mouth rinses.

However, as individual products vary, it’s advisable to consult with a dental professional for personalized recommendations, especially for individuals prone to dry mouth or xerostomia.

Preventing and Managing Dry Mouth from Sensitive Toothpaste

This section offers practical tips for those experiencing dry mouth, explores alternative toothpaste options for sensitive teeth, and advises on when to consult a dentist. 

Tips for Preventing Dry Mouth  

Preventing dry mouth involves a few simple yet effective steps: 

Stay Hydrated: Drink plenty of water throughout the day to keep your mouth moist. 

Chew Sugar-Free Gum: This stimulates saliva production. 

Avoid Alcohol and Caffeine: These can dehydrate your mouth. 

Use a Humidifier at Night: This adds moisture to the air and helps prevent dry mouth while sleeping. 

Practice Good Oral Hygiene: Regular brushing and flossing help keep your mouth clean and moist. 

Alternative Toothpaste Options for Sensitive Teeth  

If you suspect your sensitive toothpaste is contributing to dry mouth, consider these alternatives: 

SLS-Free Toothpaste: Sodium Lauryl Sulfate (SLS) can cause dry mouth in some individuals. Look for SLS-free options. 

Natural Toothpaste: These often contain gentler ingredients and may be less likely to cause dry mouth. 

Toothpaste with Hydrating Ingredients: Some toothpastes are formulated to enhance moisture in the mouth. 

When to Consult a Dentist?

It’s important to consult a dentist if: 

Dry Mouth Persists: If changing your toothpaste doesn’t help, or if dry mouth continues for an extended period. 

You Experience Discomfort or Pain: This could indicate other oral health issues. 

Before Switching Toothpaste: Especially if you have significant tooth sensitivity or other dental concerns. 

FAQs About Sensitive Toothpaste Causing Dry Mouth 

Does toothpaste with baking soda cause dry mouth?

Baking soda in toothpaste can extract moisture, potentially worsening dry mouth temporarily. However, its low abrasivity means other ingredients are more likely culprits for irritation and dryness. 

Should I avoid fluoride toothpaste if I have dry mouth?

No, fluoride toothpaste is important for fighting cavities, especially since dry mouth increases decay risk. Opt for fluoride toothpaste designed for dry mouth, free of irritating ingredients like SLS. 

Are charcoal toothpastes bad for dry mouth?

Activated charcoal in toothpaste can absorb moisture, potentially exacerbating dry mouth. Its abrasiveness might also contribute to dryness. Those with dry mouth might want to avoid highly abrasive charcoal toothpastes

Should I avoid toothpaste with hydrogen peroxide for dry mouth?

Yes, hydrogen peroxide can temporarily worsen dry mouth as it interacts with saliva. If you have chronic dry mouth issues, consult your dentist for a more suitable whitening product. 

What toothpaste ingredients help dry mouth?

Toothpastes for dry mouth may contain aloe vera, glycerin, coconut oil, and xylitol. Saliva-stimulating agents like malic acid and citric acid also help. Avoiding SLS, alcohol, and other common irritants is key. 

Wrapping Up: Dry Mouth Caused by Sensitive Toothpaste 

Understanding the potential link between sensitive toothpaste and dry mouth can be both concerning and enlightening. You may feel worried about the impact of your oral care products on your overall mouth health, but it’s empowering to know that you have options.

If you suspect that your toothpaste is contributing to dry mouth, consider trying alternatives without harsh ingredients like SLS or explore toothpastes specifically formulated for dry mouth.

Remember, maintaining good oral hygiene and consulting with your dentist are key steps in managing any oral health concerns. By staying informed and proactive, you can ensure that your smile remains both healthy and comfortable. 

Read More about Oral Health:

Does Teeth Whitening Damage Enamel? Shocking Facts! 2023

– Do Whitening Strips Destroy Enamel? The Enamel Debate! 2023

Does Fluoride Make Your Teeth Sensitive? Is Fluoride Culprit? 

– Tooth Sensitivity After A Filling: What is Normal & What NOT! 2023

Best Stain Remover for Teeth: Ultimate Guide for Stain-Free Smile (2023)

Best Teeth Whitening Dallas: Teeth Whitening in Dallas for A Sweet Smile 

Sources & References

  1. Rantanen I, Jutila K, Nicander I, Tenovuo J, Söderling E. The effects of two sodium lauryl sulphate-containing toothpastes with and without betaine on human oral mucosa in vivo. Swed Dent J. 2003;27(1):31-4. PMID: 12704946. 
  2. Kasi SR, Özcan M, Feilzer AJ. Side effects of sodium lauryl sulfate applied in toothpastes: A scoping review. Am J Dent. 2022 Apr;35(2):84-88. PMID: 35506963.
  3. Could SLS toothpastes be irritating some patients’ mouths?
  4. Rantanen I, Tenovuo J, Pienihäkkinen K, Söderling E. Effects of a betaine-containing toothpaste on subjective symptoms of dry mouth: a randomized clinical trial. J Contemp Dent Pract. 2003 May 15;4(2):11-23. PMID: 12761586.
  5. Hong JY, Lim HC, Herr Y. Effects of a mouthwash containing potassium nitrate, sodium fluoride, and cetylpyridinium chloride on dentin hypersensitivity: a randomized, double-blind, placebo-controlled study. J Periodontal Implant Sci. 2016 Feb;46(1):46-56. doi: 10.5051/jpis.2016.46.1.46. Epub 2016 Feb 15. PMID: 26937293; PMCID: PMC4771837.
  6. Sharma S, Shetty NJ, Uppoor A. Evaluation of the clinical efficacy of potassium nitrate desensitizing mouthwash and a toothpaste in the treatment of dentinal hypersensitivity. J Clin Exp Dent. 2012 Feb 1;4(1):e28-33. doi: 10.4317/jced.50665. PMID: 24558521; PMCID: PMC3908806.
  7. Dry Mouth: Simplified, OralHealth Group
  8. Can Toothpaste Cause Dry Mouth? Dental Insurance Insiders
  9. The Connection Between Alcohol and Dry Mouth, Smart Mouth

About the Author & Medical Reviewer:

Author Profile
Muhammad Muaz Sheikh

Muhammad Muaz is a seasoned professional in the realm of media and communication, boasting a Bachelor of Science in Mass Communication with a specialization in PR & Media Advertisement. With an innate understanding of effective communication strategies, Muaz has honed his expertise through extensive experience in various media houses, serving in key editorial roles. His journey in the field of media has equipped him with a profound understanding of storytelling and impactful content creation.

Author Profile
Dr. Paul Crane, DMD

Dr. Paul Crane, DMD, is a distinguished Doctor of Dental Medicine specializing in periodontics, with a career spanning over two decades. Renowned for his expertise in gum health and dental implants, Dr. Crane has become a trusted figure in the field of periodontics. His commitment to patient-centered care and advanced treatment techniques has earned him a reputation for excellence. Dr. Crane is deeply passionate about staying at the forefront of dental research and technology, ensuring his patients receive the highest quality of care available.