The dangers of dry mouth from allergy meds

Written in association with: Dr Sulaman Anwar
Published: | Updated: 03/01/2025
Edited by: Kate Forristal

If you often use allergy medications like antihistamines or decongestants, you might know about dry mouth as a possible side effect. Dr Sulaman Anwar, certified specialist periodontist, explains how antihistamine/decongestant side effects like dry mouth could lead to dental problems.

 

 

Side effects of antihistamines and decongestants on oral health

 

Dr Anwar emphasises that saliva is crucial for a healthy mouth. It helps wash away food bits, neutralises acids made by bacteria, and even aids in teeth repair. However, allergy medications like antihistamines or decongestants can reduce saliva production, making your mouth more vulnerable to harmful bacteria and tooth decay. This can increase the risk of both cavities and gum issues.

 

Thankfully, there are ways to relieve dry mouth from allergy medications. Dr Anwar recommends staying hydrated by drinking water, chewing gum that's sugar-free, and refraining from alcohol and caffeine. He also recommends using a saliva substitute or a humidifier at home to add moisture.

 

Dry mouth can be a sign of other health concerns

 

Furthermore, dry mouth can be a sign of other health problems, especially as you age, according to Dr Safa Al-Naher, the founder of Serene by Dr Safa. While ageing itself doesn't directly cause dry mouth, almost 46% of people over 65 take medications that reduce saliva, leading to dry mouth.

 

Dry mouth is often a result of medications like those for heart issues, blood pressure, and depression. Your doctor, pharmacist, or dental team can tell you if your meds might cause this. Dry mouth can also come from medical treatments like radiotherapy or head/neck surgeries.

 

In some cases, medical conditions like diabetes, lupus, sjogren's syndrome, or blocked salivary glands can directly cause dry mouth. Dr Al-Naher adds that dry mouth can even hint at more serious conditions like Parkinson's disease, autoimmune disorders, cancer, or stroke.

 

Because of these potential concerns, if you have dry mouth, it's wise to consult your dentist or doctor. People with allergies might not realise the impact of antihistamines' and decongestants' side effects on their oral health.

 

 

Dr Sulaman Anwar is a distinguished specialist periodontist with over 10 years of experience. You can schedule an appointment with Mr Anwar on his Top Doctors profile.

By Dr Sulaman Anwar
Dentistry

Dr Sulaman Anwar is a highly qualified, skilled and trusted specialist periodontist based in London. He carries out a range of surgical and non-surgical periodontal treatments, including Waterlase laser gum treatment, Chao Pinhole® surgical technique, crown lengthening, regenerative procedures, implant therapy, and treatment for gingivitis.

Dr Anwar is the director and principal dentist of the renowned dental practice, Serio Dental, a centre for excellence in oral health that offers state-of-the-art dental treatments, oral surgery, dental hygiene services, and facial aesthetic treatments.

He has been awarded multiple degrees and qualifications in the field of dentistry. Dr Anwar has a BDS from King’s College London, as well as a Diploma of Membership of the Faculty of Dental Surgeons and a Diploma in Conscious Sedation for Dentistry. In 2018, Dr Anwar was awarded a Master of Clinical Dentistry in Periodontology and a Specialty Membership in Periodontics from the Royal College of Surgeons of Edinburgh.

Dr Anwar has held significant roles in oral surgery, sedation dentistry, oral medicine, and restorative dentistry, including as an in-house general dental practitioner at the internationally-recognised University of Cambridge. He also serves as the chair of the British Dental Association’s Brent and Harrow branch, and was previously a Dental Ambassador for the Royal College of Surgeons.

As a specialist, Dr Anwar believes in patient-centred care, and uses anxiety reduction techniques and tailored approaches to ease anxious patients. He is dedicated to helping improve his patients’ quality of life through the maintenance of long-term periodontal health.

View Profile

Overall assessment of their patients


  • Related procedures
  • Platelet-rich plasma
    Botulinum toxin (Botox™)
    Dermal fillers
    Oral surgery
    Orthodontic Surgery
    Periodontal Surgery
    Impacted teeth surgery
    Maxillary bone grafts
    Dental implants
    Salivary glands pathology
    This website uses our own and third-party Cookies to compile information with the aim of improving our services, to show you advertising related to your preferences as well analysing your browsing habits. You can change your settings HERE.