Comparison · Pregnancy Smart

What decongestant is safe during pregnancy?

Assigned clinical reviewerMatt Stahl· PharmDDraft · pending clinical reviewUpdated September 18, 2026

How do the options compare?

Each option is compared on route and how much reaches the developing baby, what the pregnancy studies found, blood pressure considerations, and what the fact sheets say about breastfeeding.

Option	Studied pregnancy dose	Guideline support	Notes
Saline spray or rinse	No medication, water and saline only	No exposure to the pregnancy	The first line in every trimester because there is nothing to weigh. Humidifiers and nasal strips sit in the same category: no drug, no exposure question.
Oxymetazoline nasal spray	Applied in the nose; very little thought to be absorbed into the body when used as directed	Studies do not suggest a higher chance of birth defects at recommended doses	Works by temporarily narrowing blood vessels where it is applied. It has not been studied for use while breastfeeding.
Phenylephrine nasal spray	Applied in the nose	Nasal sprays reduce the chance of exposure to the baby compared with oral dosing	Same molecule as the oral tablet but a different exposure picture. Phenylephrine narrows blood vessels, and there is a theoretical concern about reduced blood flow through the placenta.
Phenylephrine, oral (Sudafed PE)	Swallowed, so the developing baby is exposed	More than 1,500 first-trimester exposures showed no increased chance of birth defects; one study noted a slightly higher chance of minor differences of the eyes or ears	Can raise blood pressure, so it needs a provider conversation if yours is high. Animal studies suggest it might reduce milk supply.
Pseudoephedrine, oral (Sudafed)	Swallowed, so the developing baby is exposed	ACOG does not recommend use for the first 3 months of pregnancy	Most studies have not found an increased chance of birth defects, but some found a small increased chance of gastroschisis. It might also lower the amount of milk your body makes.

Saline nasal rinses use only water and saline, so there is no medication involved and no exposure to the pregnancy. Humidifiers and nasal strips also contain no medication. 1
Most studies of pseudoephedrine in pregnancy have not found an increased chance of birth defects, but some have found a small increased chance of specific defects such as gastroschisis, and ACOG does not recommend pseudoephedrine for the first 3 months of pregnancy. 2
Oxymetazoline works by temporarily narrowing blood vessels where it is applied, and when used as directed in the nose very little is thought to be absorbed into the body. Studies do not suggest a higher chance of birth defects at recommended doses in pregnancy. 3
Studies involving more than 1,500 pregnant people who took phenylephrine in the first trimester did not show an increased chance of birth defects, though one study noted a slightly higher chance of minor differences of the eyes or ears, and phenylephrine can raise blood pressure. 4
Route changes exposure: taking an oral decongestant means the developing baby will be exposed to the medication, while nasal sprays reduce the chance of exposure depending on frequency and dose. 1

Which option makes sense?

Work up the ladder rather than down it. Saline first, then a nasal spray if you need drug, and an oral decongestant last, with pseudoephedrine specifically off the table for the first 3 months.

Disclosure: Pregnancy Smart makes supplements that overlap with some options above. This comparison describes the evidence, not our own product; where our formulation is relevant it is named.

Frequently asked questions

Which decongestant is safe in pregnancy?

The safest thing on the shelf is not a decongestant at all: saline spray or a rinse, which is water and salt with no exposure to the pregnancy. Among actual decongestants, a nasal spray puts less drug into your system than a swallowed tablet, which is the whole basis for the ranking.

Can I take Sudafed while pregnant?

ACOG does not recommend pseudoephedrine during the first 3 months of pregnancy. Most studies have not found an increased chance of birth defects overall, but some have found a small increased chance of gastroschisis, and that combination is why the first trimester gets carved out.

Is Afrin safe during pregnancy?

Oxymetazoline, the active ingredient in Afrin, narrows blood vessels right where it is sprayed, and very little is thought to be absorbed into the body when used as directed in the nose. Studies do not suggest a higher chance of birth defects at recommended doses.

What can I use for congestion in the first trimester?

Start with the no-drug options: saline rinse, a humidifier to add moisture to the air, nasal strips, rest and fluids. If those are not enough, a nasal spray is a smaller exposure than an oral tablet, and pseudoephedrine specifically is the one ACOG steers away from in these weeks.

Do decongestants affect the baby?

Oral decongestants mean the developing baby is exposed to the medication. Nasal sprays reduce that chance depending on how often and how much you use. That difference, rather than any single safety verdict, is what the choice really turns on.

References

When The Sniffles Strike During Pregnancy: Cold Meds and Your Questions Answered
MotherToBaby · https://mothertobaby.org/baby-blog/when-the-sniffles-strike-during-pregnancy-cold-meds-your-questions-answered-2/
Pseudoephedrine: MotherToBaby Fact Sheet
MotherToBaby · https://mothertobaby.org/fact-sheets/pseudoephedrine/
Oxymetazoline: MotherToBaby Fact Sheet
MotherToBaby · https://mothertobaby.org/fact-sheets/oxymetazoline/
Phenylephrine: MotherToBaby Fact Sheet
MotherToBaby · https://mothertobaby.org/fact-sheets/phenylephrine/

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.