Most nasal congestion in pregnancy is pregnancy rhinitis rather than sinusitis, and the two are managed differently: pregnancy rhinitis responds to saline and physical measures, while true sinusitis may need a prescription your doctor selects for you. Saline irrigation is first-line at any stage of pregnancy including the first trimester. Oral decongestants are avoided in the first trimester. Every medication decision in pregnancy belongs to your doctor or midwife, and this article is written to help you have that conversation, not to replace it.
Start with the general sinusitis hub and the full list of sinusitis symptoms if you are not sure what you are dealing with, or read the shorter overview on treating an episode of sinusitis during pregnancy.
Is It Sinusitis or Pregnancy Rhinitis?
Pregnancy rhinitis is hormone-driven nasal congestion with no infection, while sinusitis is inflammation of the paranasal sinuses that usually follows a viral infection.Telling them apart determines whether you need treatment at all, because pregnancy rhinitis resolves on its own after delivery and sinusitis sometimes does not.
What pregnancy rhinitis is
Eva Ellegård and colleagues defined pregnancy rhinitis as nasal congestion lasting six or more weeks in the later part of pregnancy, without signs of respiratory infection and without a known allergic cause, resolving completely within two weeks of delivery. The largest population study of the condition, conducted in Sweden with 599 participants who had no rhinitis before pregnancy, found a prevalence of 22%. Estimates across studies range from 18% to 30% depending on how rhinitis is defined.
What sinusitis adds
Sinusitis adds features that pregnancy rhinitis does not produce: thick discoloured nasal discharge, facial pain or pressure over a specific sinus, reduced sense of smell, fever, and symptoms that follow a cold rather than appearing gradually. Acute sinusitis is diagnosed when two or more symptoms are present, one of them nasal blockage or nasal discharge, and symptoms persist beyond 10 days or worsen after an initial improvement.
Why the distinction matters in pregnancy
Pregnancy rhinitis needs no antibiotic and no antibiotic will help it. Treating hormone-driven congestion as an infection exposes you and the pregnancy to medication with no prospect of benefit, which is the specific error this distinction prevents.
Why Does Pregnancy Make Nasal Congestion Worse?
Pregnancy increases nasal congestion through hormonal effects on the nasal lining, a large rise in circulating blood volume, and normal changes in immune function. These changes affect the nose in most pregnancies to some degree, which is why congestion is one of the most common non-obstetric complaints in pregnancy.
Hormonal effects on the nasal lining
Oestrogen, progesterone and placental growth hormone all act on the nasal mucosa, producing vascular changes and swelling of the lining. The exact mechanism of pregnancy rhinitis remains unsettled, and placental growth hormone is the current leading candidate rather than a proven cause.
Increased blood volume
Circulating blood volume rises substantially through pregnancy to supply the placenta and fetus. The nasal mucosa is a highly vascular tissue, so increased circulating volume engorges it and narrows the nasal airway, an effect that worsens when lying flat.
Changes in immune function
Immune adaptation during pregnancy prevents rejection of the fetus and alters the response to respiratory viruses. Combined with impaired mucociliary clearance from a swollen nasal lining, this makes it easier for a common cold to progress into sinusitis rather than resolving in the usual seven to ten days.
What Are the Symptoms of Sinusitis in Pregnancy?
Sinusitis in pregnancy produces the same cardinal symptoms as at any other time — nasal blockage, nasal discharge, facial pain or pressure, and reduced smell — but they sit on top of baseline pregnancy congestion, so they often feel more severe. The overlay is the reason symptoms are frequently dismissed as “just pregnancy”.
The four cardinal symptoms
Nasal blockage or congestion and nasal discharge are the two symptoms that carry diagnostic weight; facial pain or pressure and reduced or lost sense of smell are supporting features. Facial pain that worsens on bending forward points toward sinus origin rather than pregnancy rhinitis, and the question of whether pregnancy itself can cause sinus headache is a common one for the same reason.
Features that suggest infection rather than rhinitis
Five features point away from simple pregnancy rhinitis: thick yellow, green or brown discharge; fever; pain localised over one sinus; symptoms that began with a cold; and the double-worsening pattern in which symptoms improve for a few days and then deteriorate. Any of these justifies contacting your doctor or midwife rather than waiting.
Can Sinusitis Harm the Baby?
Sinusitis itself does not directly harm the fetus, but the fever that can accompany infection, and untreated bacterial infection, are the parts that warrant medical attention. This is the question most pregnant patients want answered first, and the honest answer separates the infection from its complications.
What sinusitis itself does
Uncomplicated sinusitis is an inflammation confined to the nose and paranasal sinuses. It causes considerable discomfort and disrupted sleep, and it reduces quality of life, but it does not cross the placenta or act on the fetus directly.
Why fever matters
Fever in pregnancy, particularly in the first trimester, is treated more seriously than fever outside pregnancy. Report a fever to your doctor or midwife rather than managing it yourself, and ask what you should take to bring it down rather than assuming an over-the-counter option is appropriate.
Why untreated bacterial infection matters
Untreated bacterial sinus infection carries the same risk of spreading beyond the sinuses in pregnancy as outside it, and the orbital and intracranial complications listed later on this page are the reason no one should wait out worsening symptoms. Pregnancy is a reason to seek assessment sooner, not later.
Which Sinusitis Treatments Are Considered Safe in Pregnancy?
Saline irrigation is the first-line treatment at any stage of pregnancy, and physical measures carry no medication risk at all; anything beyond that is a decision for your doctor. The list below describes what clinicians commonly consider. None of it is a recommendation to start treatment on your own.
Saline irrigation and saline sprays
Saline nasal irrigation and saline sprays are recommended first-line for nasal congestion during pregnancy at any gestational age, including the first trimester, because they work mechanically and are not absorbed. Use distilled, sterile or previously boiled and cooled water, never untreated tap water.
Physical measures
Four measures carry no medication exposure: humidifying room air, inhaling steam, maintaining fluid intake, and elevating the head of the bed so mucus drains and nasal blood pooling is reduced. Moderate physical activity, where your obstetric team has approved exercise, also helps nasal patency.
Intranasal corticosteroids
Intranasal corticosteroid sprays are used in pregnancy when a doctor judges them indicated, most often for allergic rhinitis rather than for pregnancy rhinitis itself. A review of intranasal corticosteroid safety found no significant association with congenital organ malformations for beclomethasone, budesonide, fluticasone propionate, fluticasone furoate or mometasone at recommended doses. Budesonide is often chosen first in pregnancy because it carries the largest body of reassuring data. These are prescription decisions, not self-care decisions.
Antibiotics when infection is bacterial
Where a doctor diagnoses bacterial sinusitis, penicillins and cephalosporins are the classes generally considered acceptable in pregnancy. Selection, dose and duration are prescriber decisions that depend on your gestational stage, allergy history and local resistance patterns. Most acute sinusitis is viral and needs no antibiotic at all, which is as true in pregnancy as outside it.
Which Sinusitis Medications Should You Avoid in Pregnancy?
Oral decongestants are avoided in the first trimester, topical decongestants are limited or avoided, and several antibiotic classes are not used in pregnancy at all. Check every product with your doctor, midwife or pharmacist before use, including anything sold without a prescription.
Oral decongestants in the first trimester
The American College of Obstetricians and Gynecologists does not recommend pseudoephedrine during the first three months of pregnancy. The evidence behind that caution is mixed: a case-control surveillance study reported a relative risk of 3.2 for gastroschisis with first-trimester use, while a later analysis of nearly 1,300 first-trimester exposures found no association. The absolute risk appears small and unconfirmed, and first-trimester avoidance remains the standard advice.
Topical decongestant sprays
Decongestant nasal sprays relieve blockage quickly and are limited to a maximum of about five days in anyone, pregnant or not, because longer use causes rebound congestion known as rhinitis medicamentosa. Pregnancy congestion lasts weeks to months, which makes decongestant sprays a poor match for the problem and a common route into a worse one.
Antibiotic classes that are not used
Tetracyclines, fluoroquinolones, aminoglycosides and trimethoprim-sulfamethoxazole are avoided in pregnancy. Tetracyclines affect fetal bone growth and discolour developing teeth. Never take a leftover antibiotic or one prescribed for someone else.
Why “natural” does not mean “safe in pregnancy”
Herbal preparations, essential oils and plant-derived sprays are not automatically safe during pregnancy, and most have never been formally studied in pregnant populations. Absence of studies is not evidence of safety. Treat every product the same way: check it with your doctor first.
Why Do FDA Pregnancy Categories No Longer Apply?
The FDA letter categories A, B, C, D and X were discontinued on 30 June 2015 and replaced by narrative safety summaries, so any article still sorting nasal sprays into “Category B” or “Category C” is using a system retired more than a decade ago. This matters because those letters are still widely quoted online and they were never as precise as they appeared.
What replaced the letter system
The Pregnancy and Lactation Labeling Rule replaced the letters with three narrative sections: pregnancy including labour and delivery, lactation, and females and males of reproductive potential. Each section summarises the actual data, the clinical considerations, and the background risk, instead of compressing all of it into a single letter.
Why the letters were withdrawn
The letter system, introduced in 1979, was criticised as overly simplistic and was widely misread as a grading scale in which B was safer than C in a consistent way. It was not. Two drugs could share a letter on the basis of very different evidence, and the letter said nothing about dose, timing in pregnancy, or the size of any risk.
How to read modern safety information
Ask three questions instead of looking for a letter: what human data exist for this drug in pregnancy, at what stage of pregnancy does any concern apply, and how does the risk compare with leaving the condition untreated. Your doctor or pharmacist can answer all three for a specific product.
Can You Use Nasodren® During Pregnancy?
No. Nasodren® should not be used during pregnancy or breastfeeding unless your doctor prescribes it, because there is no experience of its administration in pregnant or breastfeeding women. That instruction comes from the product’s own information leaflet, and it is the position this article follows without qualification.
Nasodren® is a CE 0051 Class IIA medical device, not a medicine, containing Cyclamen europaeum extract. Its evidence base — more than 30 published clinical studiesand a Level A recommendation for Cyclamen europaeum in EPOS 2012 — was generated in non-pregnant adults, and a 2018 Cochrane review of the extract for acute sinusitis concluded that its effectiveness is unknown because neither included trial reported the review’s primary outcomes. None of that evidence extends to pregnancy.
If you are pregnant, use saline and the physical measures above, and take every medication question to your doctor or midwife. If you used Nasodren® before knowing you were pregnant, mention it at your next appointment rather than worrying about it; that is exactly the kind of question a free e-Health consultation or your own clinician can address.
When Should You Contact a Doctor or Midwife About Sinus Symptoms?
Contact your maternity team the same day for fever, and seek emergency care immediately for swelling around an eye, vision changes, severe headache, confusion or neck stiffness. Pregnancy lowers the threshold for seeking advice; it does not raise it.
Emergency signs
Six signs need same-day emergency assessment regardless of pregnancy stage: swelling, redness or pain around an eye; double vision, blurred vision or vision loss; a bulging eye; a severe headache unlike your usual headaches; confusion, slurred speech or weakness on one side; and neck stiffness preventing chin-to-chest movement.
Signs that need a prompt appointment
Book promptly for fever, for symptoms lasting more than 10 days without improvement, for symptoms that improve then worsen, for facial pain severe enough to disturb sleep, and for any congestion severe enough to affect your breathing at night. Persistent night-time congestion in pregnancy is associated with snoring and disturbed sleep, both of which your maternity team will want to know about.
What Do People Ask About Sinusitis in Pregnancy?
Is a sinus infection dangerous during pregnancy?
An uncomplicated sinus infection does not act directly on the fetus. The elements that need medical attention are fever, which is treated more cautiously in pregnancy, and untreated bacterial infection, which can spread beyond the sinuses. Contact your doctor or midwife rather than waiting it out.
Can I use a saline nasal spray while pregnant?
Saline sprays and saline irrigation are recommended first-line for nasal congestion in pregnancy at any gestational age, including the first trimester, because saline acts mechanically and is not absorbed. Use distilled, sterile or previously boiled and cooled water.
Can I take a decongestant while pregnant?
The American College of Obstetricians and Gynecologists does not recommend pseudoephedrine during the first three months of pregnancy. Decongestant nasal sprays are limited to about five days of use in anyone because of rebound congestion. Ask your doctor before using either.
Will my blocked nose go away after the baby is born?
Pregnancy rhinitis is defined by resolving completely within two weeks of delivery, so hormone-driven congestion clears on its own. Congestion that persists beyond two weeks postpartum is something else and should be assessed.
Is it safe to use Nasodren® during pregnancy?
Nasodren® should not be used during pregnancy or breastfeeding unless a doctor prescribes it, because there is no experience of its use in pregnant or breastfeeding women. This is stated in the product’s own information leaflet.
Why do articles list nasal sprays by pregnancy Category A, B or C?
Those letters come from an FDA system discontinued on 30 June 2015. Content still using them is working from a retired framework. Current labelling uses narrative summaries of the actual human and animal data instead of a single letter.
Key Takeaways: What Should You Remember About Sinusitis in Pregnancy?
Most pregnancy congestion is not an infection, saline is the safe starting point, and every medication decision goes through your doctor. Six points summarise the article.
- Pregnancy rhinitis affects around 22% of pregnancies and is defined by resolving completely within two weeks of delivery — it is not sinusitis and does not need antibiotics.
- Sinusitis is distinguished by discoloured discharge, fever, localised facial pain, and the double-worsening pattern, not by congestion alone.
- Saline irrigation is first-line at any gestational age, including the first trimester, and physical measures carry no medication exposure.
- Oral decongestants are avoided in the first trimesteron ACOG advice, and several antibiotic classes including tetracyclines and fluoroquinolones are not used in pregnancy at all.
- FDA pregnancy letter categories were retired on 30 June 2015, so any source sorting treatments into Category A, B or C is out of date.
- Nasodren® is not for use in pregnancy unless a doctor prescribes it, because no data exist on its use in pregnant women.
This article is for informational purposes only and does not constitute medical advice, and it does not recommend any medication or dose. Medication decisions during pregnancy must be made by your doctor, midwife or pharmacist, who can weigh your gestational stage and medical history. Seek emergency care immediately for swelling around an eye, vision changes, severe headache, confusion, neck stiffness or high fever. Brand information for Nasodren® is included for commercial purposes; the medical content is sourced from published guidelines and peer-reviewed literature.
Which Medical Sources Support This Article?
- Ellegård EK. The etiology and management of pregnancy rhinitis. Treatments in Respiratory Medicine. 2003;2:469-475.
- Caparroz FA, Gregorio LL, Bongiovanni G, Izu SC, Kosugi EM. Rhinitis and pregnancy: literature review. Brazilian Journal of Otorhinolaryngology. 2016;82:105-111.
- US Food and Drug Administration. Pregnancy and Lactation Labeling (Drugs) Final Rule. Implemented 30 June 2015.
- Werler MM. Teratogen update: Pseudoephedrine. Birth Defects Research Part A: Clinical and Molecular Teratology. 2006.
- Alhussien AH, Alhedaithy RA, Alsaleh SA. Safety of intranasal corticosteroid sprays during pregnancy: an updated review. European Archives of Oto-Rhino-Laryngology. 2018;275(2):325-333.
- Fokkens WJ, Lund VJ, Hopkins C, et al. European Position Paper on Rhinosinusitis and Nasal Polyps 2020. Rhinology. 2020;58(Suppl S29):1-464.
- Zalmanovici Trestioreanu A, Barua A, Pertzov B. Cyclamen europaeum extract for acute sinusitis. Cochrane Database of Systematic Reviews. 2018;5:CD011341.
