It is generally considered safe to use decongestant nasal sprays for up to three days. Over the counter sprays should contain approved decongestants only. Your obstetrician should have a list of approved medications you can choose from.
Effect While Trying to Conceive : While nasal sprays don’t necessarily alter fertility, the drying action of the active ingredient could affect cervical mucus . Drying of the cervical mucus could impair fertility. There is no evidence that decongestant nasal sprays affect male fertility in any way.
Effects on Pregnancy : Nasal stuffiness is a common occurrence during pregnancy. Decongestant nasal sprays are not associated with pregnancy complications or birth defects, so most obstetricians will allow infrequent use of approved nasal sprays as needed. Using decongestant nasal sprays for more than three days can cause increased nasal congestion.
Safe During Breastfeeding : As long as decongestant nasal sprays are used as directed for no more than three consecutive days, there are no reported side effects on the breastfeeding infant . If there are other symptoms associated with your illness, like fever or body pain, contact your physician as there could be an underlying condition causing the nasal congestion.
Decongestant nasal sprays are available over-the-counter in many countries. They work to very quickly open up nasal passages by constricting blood vessels in the lining of the nose. Prolonged use of these types of sprays can damage the delicate mucous membranes in the nose. This causes increased inflammation, an effect known as rhinitis medicamentosa or the rebound effect . Decongestant nasal sprays are advised for short-term use only, preferably 5 to 7 days at maximum. Some doctors advise to use them 3 days at maximum. A recent clinical trial has shown that a corticosteroid nasal spray may be useful in reversing this condition.  Topical nasal decongestants include: