Herb & supplement monograph

Nasal Irrigation Drug Interactions, Uses, Effectiveness, Safety & More

Medically reviewed by ·Updated October 2026
What is this page for?

First and foremost: how Nasal Irrigation interacts with medications. The heart of this page is the interaction list — every drug Nasal Irrigation is known to interact with, and how serious each one is.

But these pages have grown well beyond that into a full monograph — what Nasal Irrigation is, what people use it for and how strong the evidence is, its safety and side effects, and answers to the questions we’re asked most — written and reviewed by the clinical staff at HelloPharmacist. It’s educational information from our licensed clinical databases, not medical advice, and we don’t sell or endorse products. Our editorial policy

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Interaction report

Drugs that interact with Nasal Irrigation

0 medications have a known interaction with Nasal Irrigation, graded by severity. Select any drug for the full evidence-based detail.

We don’t currently list any known drug interactions for Nasal Irrigation. This doesn’t guarantee none exist — always confirm with your pharmacist before combining supplements with your medications.

Read The List Like a Pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

  • Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
  • Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
  • Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
  • No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

  • Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
  • Probable. Interaction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
  • Possible. Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists
  • Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

  • Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
  • Each drug listed above links to the full report for that exact Nasal Irrigation combination — clinical detail, likelihood, evidence level, and citations.
  • Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.
Monograph

Nasal Irrigation: Uses, Safety & Side Effects

Medically reviewed by · Reviewed October 2026 ·
The bottom line

Nasal irrigation is rinsing the inside of your nose with a saltwater (saline) solution to wash out mucus, allergens, and irritants. It is a low-cost, generally safe option that may ease congestion and sinus symptoms, but it must be done with distilled, sterile, or properly boiled water to avoid rare but serious infections.

Common forms
Saline rinse bottles, neti pots, squeeze bottles, premixed saline packets, nasal sprays
People commonly use it for
  • Nasal congestion
  • Sinus infections (sinusitis)
  • Allergies and hay fever
  • Common cold symptoms
  • Postnasal drip
  • Dryness and crusting in the nose

Popular and traditional uses — not proof it works. See “Uses & effectiveness” below for the evidence.

Safety at a glance
OverallLikely safe

Generally safe when done with sterile or distilled water and a clean device.

PregnancyLikely Safe

When used appropriately. Saline solution is not harmful to the fetus or newborn.

Read the full pregnancy detail
BreastfeedingLikely Safe

When used appropriately. Saline solution is not harmful to the fetus or newborn.

Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center). Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Jump to a section

Overview

Nasal irrigation is a simple method of cleaning out the inside of your nose using a saltwater solution called saline. It is not an herb or supplement, but a physical rinsing technique. People use tools like a neti pot, a squeeze bottle, or a bulb syringe to pour or gently push the solution through one nostril so it flows out the other side.

The practice has roots in traditional yoga and Ayurvedic routines from South Asia, where the neti pot has long been used for nasal cleansing. Today it is widely recommended by doctors and pharmacists as a drug-free way to relieve congestion and sinus symptoms.

You can buy ready-made saline rinse kits and premixed salt packets at most pharmacies, or make your own solution at home using the correct type of water and non-iodized salt.

How it works

Nasal irrigation works mainly through a physical washing action. The saltwater flushes out thick mucus, crusts, allergens, and irritants that build up in the nose and sinuses.

The saline may also help thin mucus so it drains more easily and may improve the function of the tiny hair-like structures (called cilia) that move mucus along. Rinsing can also add moisture to dry nasal passages.

Because it acts mechanically rather than as a drug, nasal irrigation does not rely on active chemical compounds the way an herb or medication would.

Effectiveness

Does Nasal Irrigation work?

Here’s what the research actually shows for each use — graded by Natural Medicines and reviewed by .

Evidence overview · 9 uses evaluated
3 Possibly effective 6 Insufficient evidence
How to read these evidence grades

Natural Medicines’ 7-point scale. We show each rating’s label word-for-word.

1EffectiveStrong, consistent evidence it works.
2Likely EffectiveGood evidence, though not yet conclusive.
3Possibly EffectiveSome evidence suggests a benefit.
4Possibly IneffectiveSome evidence it may not help.
5Likely IneffectiveFairly strong evidence it doesn’t help.
6IneffectiveStrong evidence it doesn’t work.
7Insufficient Reliable Evidence to RateToo little research to say either way.
Possibly Effective Allergic rhinitis (hay fever)
Rating & evidence shown verbatim from Natural Medicines

Short-term use of nasal irrigation seems to reduce symptoms of allergic rhinitis in adults and children.

Possibly Effective Intranasal surgery
Rating & evidence shown verbatim from Natural Medicines

Small clinical studies suggest that nasal irrigation may benefit patients after intranasal surgery.

Possibly Effective Rhinosinusitis
Rating & evidence shown verbatim from Natural Medicines

Small clinical studies suggest that nasal irrigation modestly improves rhinosinusitis symptoms.

Also studied for 6 conditions — evidence insufficient to rate
Insufficient Reliable Evidence To Rate Asthma
Rating & evidence shown verbatim from Natural Medicines

It is unclear if nasal irrigation is beneficial in children with asthma.

Insufficient Reliable Evidence To Rate Bronchiolitis
Rating & evidence shown verbatim from Natural Medicines

It is unclear if nasal irrigation is beneficial in infants with bronchiolitis.

Insufficient Reliable Evidence To Rate Common cold
Rating & evidence shown verbatim from Natural Medicines

It is unclear if nasal irrigation is beneficial for common cold prevention.

Insufficient Reliable Evidence To Rate Coronavirus disease 2019 (COVID-19)
Rating & evidence shown verbatim from Natural Medicines

It is unclear if nasal irrigation is beneficial in patients with COVID-19.

Insufficient Reliable Evidence To Rate Nonallergic rhinitis
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using nasal irrigation for nonallergic rhinitis, there is insufficient reliable information about the clinical effects of nasal irrigation for this purpose.

Insufficient Reliable Evidence To Rate Respiratory tract infections
Rating & evidence shown verbatim from Natural Medicines

It is unclear if nasal irrigation is beneficial in adults or children with respiratory tract infections.

Source & disclaimer. Effectiveness ratings and evidence summaries are provided by Natural Medicines (Therapeutic Research Center) and shown as licensed. Where Natural Medicines hasn’t rated a use, HelloPharmacist’s pharmacists may add their own reviewed rating and evidence (each such entry is labeled). This is educational information, not medical advice — talk with your pharmacist or doctor before starting, stopping, or changing a supplement.

Safety & precautions

Nasal irrigation is generally safe when done correctly. The most important safety rule is to use the right kind of water. Never use untreated tap water. Use distilled or sterile water, or boil tap water for several minutes and let it cool first.

This matters because, in very rare cases, tap water can contain microscopic organisms (including a dangerous amoeba) that can cause a serious, life-threatening infection if rinsed into the nose. Boiling, distilling, or using sterile water removes this risk.

Keep your device clean and dry between uses, and replace it as recommended to prevent germ buildup. People who have had recent nasal or sinus surgery, those with facial weakness or trouble swallowing, and young children should check with a doctor first.

Pregnancy and breastfeeding: Saline nasal rinsing is a drug-free option that is often considered safe during pregnancy and breastfeeding because nothing is absorbed into the body in a meaningful way. Still, it is wise to confirm with your doctor or pharmacist, and the same clean-water rules apply.

Side effects

Most people tolerate nasal irrigation well. Common, mild side effects include a stinging or burning feeling, nasal irritation, sneezing, a sense of fullness in the ears, or some leftover solution dripping out afterward. Using a solution that is too salty or not at the right temperature can make stinging worse.

Doing it too often may dry out or irritate the nose in some people. Rarely, nosebleeds can occur.

The most serious concern is a rare brain infection linked to using contaminated, untreated tap water. This is preventable by always using distilled, sterile, or properly boiled and cooled water.

Nasal Irrigation: Reported Adverse Effects

Documented safety reports on Nasal Irrigation from the evidence-graded Natural Medicines (TRC Healthcare) database, shown word-for-word from the licensed record.

Nasal irrigation can cause mild side effects including nasal burning, pain, stinging, discharge, and irritation, and ear fullness, ringing, and pain. Irrigation solutions with a higher concentration of salt increase these side effects. In rare cases, epistaxis, nausea, coughing, and headaches have occurred. There is some concern that chronic use of nasal irrigation might actually increase the risk of sinus infection if water, bottles, or tools are contaminated. Also, there have been reports of amebic brain infection in people using tap water in neti pots. The ameba enters the body via the nasal passages. To use nasal irrigation safely, good hygiene is necessary.

  1. Saline nasal irrigation and use of neti pots. Pharmacist's Letter/Prescriber's Letter 2008;24(3):240307.
  2. Rabago D, Zgierska A. Saline nasal irrigation for upper respiratory conditions. Am Fam Physician 2009;80:1117-9.
  3. Rabago D, Zgierska A, Mundt M, et al. Efficacy of daily hypertonic saline nasal irrigation among patients with sinusitis: a randomized controlled trial. J Fam Pract 2002;51(12):1049-55.
  4. Chusakul S, Warathanasin S, Suksangpanya N, et al.. Comparison of buffered and nonbuffered nasal saline irrigations in treating allergic rhinitis. Laryngoscope. 2013 Jan;123(1):53-6.
  5. Jeffe JS, Bhushan B, Schroeder JW Jr. Nasal saline irrigation in children: a study of compliance and tolerance. Int J Pediatr Otorhinolaryngol. 2012 Mar;76(3):409-13.
  6. King D, Mitchell B, Williams CP, Spurling GK. Saline nasal irrigation for acute upper respiratory tract infections. Cochrane Database Syst Rev. 2015 Apr 20;(4):CD006821.
  7. Satdhabudha A, Utispan K, Monthanapisut P, Poachanukoon O. A randomized controlled study comparing the efficacy of nasal saline irrigation devices in children with acute rhinosinusitis. Asian Pac J Allergy Immunol. 2016 Aug 16.
  8. Wei JL, Sykes KJ, Johnson P, He J, Mayo MS. Safety and efficacy of once-daily nasal irrigation for the treatment of pediatric chronic rhinosinusitis. Laryngoscope. 2011 Sep;121(9):1989-2000.
  9. Baraniuk JN, El-Amin S, Corey R, Rayhan R, Timbol C. Carnosine treatment for gulf war illness: a randomized controlled trial. Glob J Health Sci 2013;5(3):69-81.
  10. Nsouli TM. Long-term use of nasal saline irrigation: harmful or helpful (abstract 32). Ann Allergy Asthma Immunol 2009;103(5 Suppl 3):A27-8.
  11. North Louisiana woman dies from rare ameba infection. Louisiana Department of Public Health, December 6, 2011. Available at: http://new.dhh.louisiana.gov/index.cfm/newsroom/detail/2332. (Accessed 4 January 2012).

Nasal irrigation is generally well tolerated when used short-term with appropriately prepared solutions and materials.

Most Common Adverse Effects:

Burning, discharge, irritation, pain, and stinging.

Serious Adverse Effects (Rare):

Amoebic brain infection, bone abscess, endocarditis, and nasal septal perforation.

Reports by condition
Allergic rhinitis (hay fever) Immunologic

There is some concern that chronic use of nasal irrigation might actually increase the risk of sinus infection recurrence in patients with chronic rhinosinusitis. In a preliminary study, chronic users of nasal irrigation had a reduced risk of rhinosinusitis recurrence after discontinuing nasal irrigation compared to those who continued using nasal irrigation. It is unclear if this is due to nasal irrigation itself or improper use of irrigation such as using contaminated rinse bottles. Some evidence suggests that 67% of bottles used for nasal irrigation are contaminated with Staphylococcus aureus while 86% to 97% demonstrate bacterial growth of some sort. Use of tap water or boiling water to clean bottles was not effective. Cleaning with detergent, Milton's solution, and/or microwave sterilization was more effective. Use of a one-way valve on the bottle to prevent re-contamination does not appear to be effective.

There have been two reports of amebic brain infection in people using neti pots for nasal irrigation. In these reports, patients were using tap water in Louisiana. Amebic infection is more common with freshwater from warm climate lakes and rivers. The ameba enters the body via the nasal passages. Tap water should not be used for nasal irrigation.

There is also one case report of a patient developing an abscess around a cochlear implant and into the mastoid bone following nasal irrigation for an acute sinusitis episode. The patient experienced fever. The cochlear implant was removed, testing positive for Group A streptococcus and Propionibacterium acnes.

To use nasal irrigation safely, good hygiene is necessary. To maintain good hygiene, boiled, bottled, or distilled water should be used in the neti pots or rinse bottles for irrigating. Pots and rinse bottles should also be washed with hot soapy water after every use and should never be shared with other people. Rinse bottles should also be switched to a new bottle monthly.

  1. Nsouli TM. Long-term use of nasal saline irrigation: harmful or helpful (abstract 32). Ann Allergy Asthma Immunol 2009;103(5 Suppl 3):A27-8.
  2. Keen M, Foreman A, Wormald PJ. The clinical significance of nasal irrigation bottle contamination. Laryngoscope. 2010 Oct;120(10):2110-4.
  3. Satdhabudha A, Utispan K, Monthanapisut P, Poachanukoon O. A randomized controlled study comparing the efficacy of nasal saline irrigation devices in children with acute rhinosinusitis. Asian Pac J Allergy Immunol. 2016 Aug 16.
  4. North Louisiana woman dies from rare ameba infection. Louisiana Department of Public Health, December 6, 2011. Available at: http://new.dhh.louisiana.gov/index.cfm/newsroom/detail/2332. (Accessed 4 January 2012).
  5. Cain RB, Lal D, Barrs DM. Infected cochlear implant after large-volume nasal irrigation. Otol Neurotol. 2015 Jan;36(1):12-3.
Cluster headache Neurologic/CNS

Rarely, nasal irrigation can cause side effects such as headache.

  1. Holmstrom M, Rosen G, Wahlander L. Effect of nasal lavage on nasal symptoms and physiology in wood industry workers. Rhinology 1997;35(3):108-12.
Nausea and vomiting Gastrointestinal

Rarely, nausea has occured.

  1. Jeffe JS, Bhushan B, Schroeder JW Jr. Nasal saline irrigation in children: a study of compliance and tolerance. Int J Pediatr Otorhinolaryngol. 2012 Mar;76(3):409-13.
Otitis media Ocular/Otic

Nasal irrigation can cause side effects including ear fullness, ringing, popping, and pain. Irrigation solutions with a higher concentration of salt might increase this side effect.

  1. Saline nasal irrigation and use of neti pots. Pharmacist's Letter/Prescriber's Letter 2008;24(3):240307.
  2. Rabago D, Zgierska A. Saline nasal irrigation for upper respiratory conditions. Am Fam Physician 2009;80:1117-9.
  3. Chusakul S, Warathanasin S, Suksangpanya N, et al.. Comparison of buffered and nonbuffered nasal saline irrigations in treating allergic rhinitis. Laryngoscope. 2013 Jan;123(1):53-6.
  4. Jeffe JS, Bhushan B, Schroeder JW Jr. Nasal saline irrigation in children: a study of compliance and tolerance. Int J Pediatr Otorhinolaryngol. 2012 Mar;76(3):409-13.
  5. Satdhabudha A, Utispan K, Monthanapisut P, Poachanukoon O. A randomized controlled study comparing the efficacy of nasal saline irrigation devices in children with acute rhinosinusitis. Asian Pac J Allergy Immunol. 2016 Aug 16.
  6. Wei JL, Sykes KJ, Johnson P, He J, Mayo MS. Safety and efficacy of once-daily nasal irrigation for the treatment of pediatric chronic rhinosinusitis. Laryngoscope. 2011 Sep;121(9):1989-2000.
Pain Pulmonary/Respiratory

Nasal irrigation can cause side effects including nasal burning, pain, stinging, discharge, and irritation. Irrigation solutions with a higher concentration of salt increase these side effects. In rare cases, epistaxis and coughing have occurred. Nasal irrigation does not seem to negatively impact the sense of smell.

  1. Saline nasal irrigation and use of neti pots. Pharmacist's Letter/Prescriber's Letter 2008;24(3):240307.
  2. Rabago D, Zgierska A. Saline nasal irrigation for upper respiratory conditions. Am Fam Physician 2009;80:1117-9.
  3. Rabago D, Zgierska A, Mundt M, et al. Efficacy of daily hypertonic saline nasal irrigation among patients with sinusitis: a randomized controlled trial. J Fam Pract 2002;51(12):1049-55.
  4. Chusakul S, Warathanasin S, Suksangpanya N, et al.. Comparison of buffered and nonbuffered nasal saline irrigations in treating allergic rhinitis. Laryngoscope. 2013 Jan;123(1):53-6.
  5. Jeffe JS, Bhushan B, Schroeder JW Jr. Nasal saline irrigation in children: a study of compliance and tolerance. Int J Pediatr Otorhinolaryngol. 2012 Mar;76(3):409-13.
  6. King D, Mitchell B, Williams CP, Spurling GK. Saline nasal irrigation for acute upper respiratory tract infections. Cochrane Database Syst Rev. 2015 Apr 20;(4):CD006821.
  7. Satdhabudha A, Poachanukoon O. Efficacy of buffered hypertonic saline nasal irrigation in children with symptomatic allergic rhinitis: a randomized double-blind study. Int J Pediatr Otorhinolaryngol. 2012 Apr;76(4):583-8.
  8. Satdhabudha A, Utispan K, Monthanapisut P, Poachanukoon O. A randomized controlled study comparing the efficacy of nasal saline irrigation devices in children with acute rhinosinusitis. Asian Pac J Allergy Immunol. 2016 Aug 16.
  9. Wei JL, Sykes KJ, Johnson P, He J, Mayo MS. Safety and efficacy of once-daily nasal irrigation for the treatment of pediatric chronic rhinosinusitis. Laryngoscope. 2011 Sep;121(9):1989-2000.
  10. Liu L, Pan M, Li Y, Tan G, Yang Y. Efficacy of nasal irrigation with hypertonic saline on chronic rhinosinusitis: systematic review and meta-analysis. Braz J Otorhinolaryngol 2020;86(5):639-646.
  11. Yata K, Srivanitchapoom C. The comparison of nasal irrigation outcome between 3% NaCl and 0.9% NaCl in adults majority with intermittent allergic rhinitis: A randomized double-blind study. Asian Pac J Allergy Immunol 2021;39(1):9-14.
  12. Liu JJ, Chan GC, Hecht AS, Storm DR, Davis GE. Nasal saline irrigation has no effect on normal olfaction: a prospective randomized trial. Int Forum Allergy Rhinol. 2014 Jan;4(1):39-42.
Pain (acute) Pulmonary/Respiratory

Nasal irrigation can cause nasal burning, pain, stinging, discharge, and irritation. Irrigation solutions with a higher concentration of salt increase these side effects. In rare cases, epistaxis and coughing have occurred.

Three case reports describe nasal septal perforation in adult females who used nasal irrigation with 300 mL fluid twice daily for 2.5-4 months after endoscopic sinus surgery. The irrigation contained sodium chloride 0.9%, menthol, and peppermint in boiled tap water, and was administered at 40oC using a pumped spray device.

  1. Saline nasal irrigation and use of neti pots. Pharmacist's Letter/Prescriber's Letter 2008;24(3):240307.
  2. Rabago D, Zgierska A. Saline nasal irrigation for upper respiratory conditions. Am Fam Physician 2009;80:1117-9.
  3. Rabago D, Zgierska A, Mundt M, et al. Efficacy of daily hypertonic saline nasal irrigation among patients with sinusitis: a randomized controlled trial. J Fam Pract 2002;51(12):1049-55.
  4. Chusakul S, Warathanasin S, Suksangpanya N, et al.. Comparison of buffered and nonbuffered nasal saline irrigations in treating allergic rhinitis. Laryngoscope. 2013 Jan;123(1):53-6.
  5. Jeffe JS, Bhushan B, Schroeder JW Jr. Nasal saline irrigation in children: a study of compliance and tolerance. Int J Pediatr Otorhinolaryngol. 2012 Mar;76(3):409-13.
  6. King D, Mitchell B, Williams CP, Spurling GK. Saline nasal irrigation for acute upper respiratory tract infections. Cochrane Database Syst Rev. 2015 Apr 20;(4):CD006821.
  7. Satdhabudha A, Poachanukoon O. Efficacy of buffered hypertonic saline nasal irrigation in children with symptomatic allergic rhinitis: a randomized double-blind study. Int J Pediatr Otorhinolaryngol. 2012 Apr;76(4):583-8.
  8. Satdhabudha A, Utispan K, Monthanapisut P, Poachanukoon O. A randomized controlled study comparing the efficacy of nasal saline irrigation devices in children with acute rhinosinusitis. Asian Pac J Allergy Immunol. 2016 Aug 16.
  9. Wei JL, Sykes KJ, Johnson P, He J, Mayo MS. Safety and efficacy of once-daily nasal irrigation for the treatment of pediatric chronic rhinosinusitis. Laryngoscope. 2011 Sep;121(9):1989-2000.
  10. Liu L, Pan M, Li Y, Tan G, Yang Y. Efficacy of nasal irrigation with hypertonic saline on chronic rhinosinusitis: systematic review and meta-analysis. Braz J Otorhinolaryngol 2020;86(5):639-646.
  11. Yata K, Srivanitchapoom C. The comparison of nasal irrigation outcome between 3% NaCl and 0.9% NaCl in adults majority with intermittent allergic rhinitis: A randomized double-blind study. Asian Pac J Allergy Immunol 2021;39(1):9-14.
Pain (acute) Ocular/Otic

Nasal irrigation can cause ear fullness, ringing, popping, and pain, which occur more commonly with hypertonic irrigation solutions. Administering nasal irrigation at a fast rate or high pressure has been shown to increase ear drainage (otorrhea) in children with tympanostomy tubes for otitis media.

  1. Saline nasal irrigation and use of neti pots. Pharmacist's Letter/Prescriber's Letter 2008;24(3):240307.
  2. Rabago D, Zgierska A. Saline nasal irrigation for upper respiratory conditions. Am Fam Physician 2009;80:1117-9.
  3. Chusakul S, Warathanasin S, Suksangpanya N, et al.. Comparison of buffered and nonbuffered nasal saline irrigations in treating allergic rhinitis. Laryngoscope. 2013 Jan;123(1):53-6.
  4. Jeffe JS, Bhushan B, Schroeder JW Jr. Nasal saline irrigation in children: a study of compliance and tolerance. Int J Pediatr Otorhinolaryngol. 2012 Mar;76(3):409-13.
  5. Satdhabudha A, Utispan K, Monthanapisut P, Poachanukoon O. A randomized controlled study comparing the efficacy of nasal saline irrigation devices in children with acute rhinosinusitis. Asian Pac J Allergy Immunol. 2016 Aug 16.
  6. Wei JL, Sykes KJ, Johnson P, He J, Mayo MS. Safety and efficacy of once-daily nasal irrigation for the treatment of pediatric chronic rhinosinusitis. Laryngoscope. 2011 Sep;121(9):1989-2000.
Rhinosinusitis Immunologic

There is some concern that chronic use of nasal irrigation might actually increase the risk of sinus infection recurrence in patients with chronic rhinosinusitis. In a preliminary study, chronic users of nasal irrigation had a reduced risk of rhinosinusitis recurrence after discontinuing nasal irrigation compared to those who continued using nasal irrigation. It is unclear if this is due to nasal irrigation itself or improper use of irrigation such as using contaminated rinse bottles. Some evidence suggests that 67% of bottles used for nasal irrigation are contaminated with Staphylococcus aureus while 86% to 97% demonstrate bacterial growth of some sort. Use of tap water or boiling water to clean bottles was not effective. Cleaning with detergent, Milton's solution, and/or microwave sterilization was more effective. Use of a one-way valve on the bottle to prevent re-contamination does not appear to be effective.

There have been two reports of amebic brain infection in people using neti pots for nasal irrigation. In these reports, patients were using tap water in Louisiana. Amebic infection is more common with freshwater from warm climate lakes and rivers. The ameba enters the body via the nasal passages. Tap water should not be used for nasal irrigation.

There is also one case report of a patient developing an abscess around a cochlear implant and into the mastoid bone following nasal irrigation for an acute sinusitis episode. The patient experienced fever. The cochlear implant was removed, testing positive for Group A streptococcus and Propionibacterium acnes.

A case report describes a 49-year-old female with chronic allergic rhinitis who developed mitral valve endocarditis with regurgitation, and positive cultures for Streptococcus mitis after chronic, regular nasal irrigation with normal saline up to 4 times daily. A prolonged course of antibiotics was required.

To use nasal irrigation safely, good hygiene is necessary. To maintain good hygiene, boiled, bottled, or distilled water should be used in the neti pots or rinse bottles for irrigating. Pots and rinse bottles should also be washed with hot soapy water after every use and should never be shared with other people. Rinse bottles should also be switched to a new bottle monthly.

  1. Nsouli TM. Long-term use of nasal saline irrigation: harmful or helpful (abstract 32). Ann Allergy Asthma Immunol 2009;103(5 Suppl 3):A27-8.
  2. Keen M, Foreman A, Wormald PJ. The clinical significance of nasal irrigation bottle contamination. Laryngoscope. 2010 Oct;120(10):2110-4.
  3. Satdhabudha A, Utispan K, Monthanapisut P, Poachanukoon O. A randomized controlled study comparing the efficacy of nasal saline irrigation devices in children with acute rhinosinusitis. Asian Pac J Allergy Immunol. 2016 Aug 16.
  4. North Louisiana woman dies from rare ameba infection. Louisiana Department of Public Health, December 6, 2011. Available at: http://new.dhh.louisiana.gov/index.cfm/newsroom/detail/2332. (Accessed 4 January 2012).
  5. Cain RB, Lal D, Barrs DM. Infected cochlear implant after large-volume nasal irrigation. Otol Neurotol. 2015 Jan;36(1):12-3.
Tension headache Neurologic/CNS

Rarely, nasal irrigation can cause headache.

  1. Holmstrom M, Rosen G, Wahlander L. Effect of nasal lavage on nasal symptoms and physiology in wood industry workers. Rhinology 1997;35(3):108-12.
DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.

Adverse-effects data: Natural Medicines, Therapeutic Research Center

Dosing

There is no single official dose for nasal irrigation. Many people rinse once or twice a day when they have symptoms, but you should follow the directions on your specific product or kit.

Premixed saline packets are designed to make a comfortable salt concentration, so follow the packet instructions for how much salt and water to combine. If symptoms are not improving, are getting worse, or you have signs of infection like fever, see your doctor.

Always use distilled, sterile, or boiled-and-cooled water, and clean your device after each use. If you are unsure how to do it safely, ask your pharmacist to walk you through it.

Pregnancy & Breastfeeding
DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.

© 2026 Therapeutic Research Center

Pregnancy & lactation ratings: Natural Medicines, Therapeutic Research Center

References & further reading

The 19 references that drive our Nasal Irrigation monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.

  1. Saline nasal irrigation and use of neti pots. Pharmacist's Letter/Prescriber's Letter 2008;24(3):240307.
  2. Rabago D, Zgierska A. Saline nasal irrigation for upper respiratory conditions. Am Fam Physician 2009;80:1117-9. DOI
  3. Nsouli TM. Long-term use of nasal saline irrigation: harmful or helpful (abstract 32). Ann Allergy Asthma Immunol 2009;103(5 Suppl 3):A27-8.
  4. North Louisiana woman dies from rare ameba infection. Louisiana Department of Public Health, December 6, 2011. Available at: http://new.dhh.louisiana.gov/index.cfm/newsroom/detail/2332. (Accessed 4 January 2012).
  5. Holmstrom M, Rosen G, Wahlander L. Effect of nasal lavage on nasal symptoms and physiology in wood industry workers. Rhinology 1997;35(3):108-12.
  6. Rabago D, Zgierska A, Mundt M, et al. Efficacy of daily hypertonic saline nasal irrigation among patients with sinusitis: a randomized controlled trial. J Fam Pract 2002;51(12):1049-55.
  7. Cain RB, Lal D, Barrs DM. Infected cochlear implant after large-volume nasal irrigation. Otol Neurotol. 2015 Jan;36(1):12-3. PubMed
  8. Chusakul S, Warathanasin S, Suksangpanya N, et al.. Comparison of buffered and nonbuffered nasal saline irrigations in treating allergic rhinitis. Laryngoscope. 2013 Jan;123(1):53-6. DOI
  9. Hermelingmeier KE, Weber RK, Hellmich M, Heubach CP, Mösges R. Nasal irrigation as an adjunctive treatment in allergic rhinitis: a systematic review and meta-analysis. Am J Rhinol Allergy. 2012 Sep-Oct;26(5):e119-25. PubMed
  10. Jeffe JS, Bhushan B, Schroeder JW Jr. Nasal saline irrigation in children: a study of compliance and tolerance. Int J Pediatr Otorhinolaryngol. 2012 Mar;76(3):409-13. PubMed
  11. Keen M, Foreman A, Wormald PJ. The clinical significance of nasal irrigation bottle contamination. Laryngoscope. 2010 Oct;120(10):2110-4. PubMed
  12. King D, Mitchell B, Williams CP, Spurling GK. Saline nasal irrigation for acute upper respiratory tract infections. Cochrane Database Syst Rev. 2015 Apr 20;(4):CD006821. PubMed
  13. Liu JJ, Chan GC, Hecht AS, Storm DR, Davis GE. Nasal saline irrigation has no effect on normal olfaction: a prospective randomized trial. Int Forum Allergy Rhinol. 2014 Jan;4(1):39-42. PubMed
  14. Satdhabudha A, Poachanukoon O. Efficacy of buffered hypertonic saline nasal irrigation in children with symptomatic allergic rhinitis: a randomized double-blind study. Int J Pediatr Otorhinolaryngol. 2012 Apr;76(4):583-8. PubMed
  15. Satdhabudha A, Utispan K, Monthanapisut P, Poachanukoon O. A randomized controlled study comparing the efficacy of nasal saline irrigation devices in children with acute rhinosinusitis. Asian Pac J Allergy Immunol. 2016 Aug 16.
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This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

Pharmacist Counseling Corner

Nasal Irrigation: Common Questions

What is Nasal Irrigation used for, and does it work?
People use Nasal Irrigation for many reasons, but the evidence varies by use. According to the Natural Medicines database, there is at least some clinical evidence supporting Nasal Irrigation for Allergic rhinitis (hay fever), Intranasal surgery and Rhinosinusitis. For most other uses it has been studied for, the evidence is currently insufficient to rate. See the graded list on this page, and always confirm with your pharmacist or doctor.
Does Nasal Irrigation interact with prescription medications?
We do not currently list any known drug interactions for Nasal Irrigation. This does not guarantee that none exist, so always confirm with your pharmacist before combining it with your medications.
How are Nasal Irrigation interactions rated?
Each interaction is graded major, moderate, or minor based on how clinically significant it is and the strength of the evidence behind it. Major interactions are the most serious and are best avoided, or used only under close professional supervision.
Is it safe to take Nasal Irrigation with my medications?
It depends on the specific medication. Some combinations are fine, while others call for monitoring, timing changes, or should be avoided. Check your exact drug above and confirm with your pharmacist or doctor before starting, stopping, or changing anything.
Where does this Nasal Irrigation interaction information come from?
Our interaction data is built on the Natural Medicines database — an evidence-graded reference for vitamins, herbs, and supplements — and is reviewed by licensed HelloPharmacist pharmacists, who may add clinical context.
What is Nasal Irrigation used for?
It is mainly used to relieve nasal congestion, sinus symptoms, allergies, and cold symptoms by rinsing mucus, allergens, and irritants out of the nose.
Can I use regular tap water for nasal rinsing?
No. Use distilled or sterile water, or boil tap water for several minutes and let it cool first, because untreated tap water can rarely contain organisms that cause serious infection.
How often can I rinse my nose?
Many people rinse once or twice a day during symptoms, but follow your product's instructions and avoid overdoing it, which can dry out or irritate the nose.
Is Nasal Irrigation safe during pregnancy?
Saline rinsing is a drug-free option often considered safe in pregnancy since nothing meaningful is absorbed, but it's best to confirm with your doctor and always use clean water.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

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