Decongestant nasal spray rebound: why it happens and how long to use sprays

Decongestant nasal sprays work fast, but using them for more than a few days can leave your nose more blocked than it was before. This is called rebound congestion, or rhinitis medicamentosa. The label limit is 3 days, and the fix starts with coming off the spray.

What is rebound congestion?

Cleveland Clinic defines rhinitis medicamentosa as nasal obstruction that happens when you overuse nasal decongestant sprays. The usual culprits are sprays containing oxymetazoline, sold under names like Afrin, and phenylephrine. Gels and drops with the same ingredients can do it too, though most cases involve sprays.

The main symptom is a blocked nose that makes it hard to breathe. That's the frustrating part. The symptom of overuse looks exactly like the problem you started using the spray for, so it's easy to keep reaching for it.

The research behind all this is thinner than you might expect. A 2006 review in the Journal of Investigational Allergology and Clinical Immunology notes that very few prospective studies of the condition have been done, and that most of what's known comes from case reports and tissue studies.

Why does it happen?

Decongestant sprays shrink the blood vessels inside your nose. Cleveland Clinic explains that this reduces blood flow to the nasal tissue, and less blood flow means less swelling, so you can breathe again.

Used too much, the same effect becomes the problem. According to Cleveland Clinic, excessive use can deprive the nasal lining of the blood it needs, which leads to tissue damage and inflammation in response. The swelling comes back, and the drug label itself warns that frequent or prolonged use may make congestion recur or worsen.

The 2006 review describes the changes found in the nasal lining of people with the condition. They include loss of the tiny hair-like cilia, swelling of the lining and inflammatory cells moving into the tissue.

How do you know if you have it?

There's no simple home test for rebound congestion, but a few patterns point toward it. Cleveland Clinic describes these:

• The spray seems to work less and less, so it takes more sprays to unblock your nose.
• Your nose is blocked, but you don't have the eye, ear or throat symptoms that usually come with a cold or allergies. Rebound congestion only affects the nasal passages.
• Going without the spray brings on headaches, or a feeling that you can't get enough air.

Cleveland Clinic also says people who deal with a stuffy nose all the time, from allergies or a deviated septum for example, may be more at risk, because the need to feel unblocked makes them more likely to reach for a spray.

A doctor can usually diagnose it by asking about your symptoms and how often you use the spray, and by looking inside your nose to rule out a sinus infection or other causes. Cleveland Clinic stresses being honest with your provider about how often you're actually spraying.

The 2006 review adds one more thing worth knowing. A similar kind of congestion can come from some medicines taken by mouth, including certain blood pressure medicines, antipsychotics and oral contraceptives. If you're congested and don't use a spray, it's worth asking your doctor whether anything you take could be playing a part.

How long can you safely use a decongestant spray?

How long you can safely use a decongestant spray is set by its label, so follow it. The drug facts on oxymetazoline sprays such as Afrin say not to use them for more than 3 days, and warn that frequent or prolonged use may cause nasal congestion to recur or worsen. Cleveland Clinic gives the same 3-day limit.

The exact point where rebound starts isn't known. The 2006 review says the cumulative dose or length of use needed to trigger it hasn't been conclusively determined, so these sprays should be used for the shortest period necessary.

One small study shows why the question is messy. In 1997, researchers had 10 healthy volunteers use oxymetazoline once nightly for 4 weeks. Measurements of their noses showed no adverse effects. Even so, 8 of the 10 developed nasal blockage each night a few hours before their next dose, which cleared within 48 hours once they stopped. Ten healthy people is far too few to change the advice, and the label still says 3 days.

If you have a cold and need a spray to get through a couple of bad nights, using it as directed is what it's for. If you find yourself still using it after the label limit, that's the point to talk to a pharmacist or doctor.

How do you use a decongestant spray properly?

Getting the most out of each dose makes it easier to stay inside the 3-day window. The Afrin label gives these directions for adults, and for children aged 6 to 11 with adult supervision:

• Shake the bottle, and prime a new pump by pressing it firmly several times before the first use.
• Keep your head upright rather than tilting it back, put the nozzle in one nostril, press firmly and sniff deeply.
• Use 2 or 3 sprays in each nostril no more often than every 10 to 12 hours, and no more than 2 doses in 24 hours.
• Wipe the nozzle clean afterward, and don't share the bottle, since the label warns that more than one person using it may spread infection.

The label says some burning, stinging, sneezing or extra runny nose can happen for a short time after a dose. It also says to ask a doctor before using it if you have heart disease, high blood pressure, thyroid disease, diabetes or trouble urinating because of an enlarged prostate, and to ask a health professional first if you're pregnant or breastfeeding. For children under 6, the label says to ask a doctor.

How do you get off the spray?

Stopping the decongestant is the core of treatment. The 2006 review calls it the first-line treatment and says intranasal steroids can be used to speed recovery if needed.

Advice on how to stop varies. Cleveland Clinic recommends reducing use gradually, because stopping abruptly can make symptoms worse. Its list of options to help includes steroid nasal sprays such as fluticasone, antihistamine nasal sprays, saline sprays and oral decongestants. Some of these aren't right for everyone, so it's worth getting a doctor or pharmacist involved, especially if you have heart disease, high blood pressure or another condition the spray label lists.

Cleveland Clinic notes that oral decongestants such as pseudoephedrine don't carry the same rebound risk, but they can cause other problems if overused, so they also need to be taken only as the label directs. The Sleep Foundation adds that decongestants can raise blood pressure and make it harder to sleep, which matters if you'd be taking one in the evening.

Expect it to take time. Cleveland Clinic says your nose may take anywhere from a few days to several weeks to feel clear after weaning off the spray. The good news is that it describes the condition as reversible, and most people get relief once they stop overusing the spray. Surgery is only needed when long-term use has severely damaged the tissue inside the nose.

How do you get through the nights while you come off it?

The first week or so can be uncomfortable, especially at bedtime. These are the drug-free comfort measures the Sleep Foundation suggests for a blocked nose at night, and none of them carry a rebound risk:

• Raise your head with a wedge pillow, a thick pillow or two regular pillows. Lying flat often makes congestion feel worse.
• Use saline. Cleveland Clinic says saline sprays help clear mucus and crusting and don't contain the chemicals that cause rhinitis medicamentosa. A rinse goes further, and how to use a saline rinse covers the steps.
• Take a warm, steamy shower before bed, or hold a warm (not hot) washcloth over your nose and sinuses for a few minutes.
• Run a humidifier overnight to stop the air drying out your nose.
• Try a nasal strip. Strips work mechanically and contain no medicine. A 2016 meta-analysis found that nasal dilators improve nasal breathing, which can make the nights easier while the swelling settles. Nasal strips vs. nasal spray compares the two approaches.

If you use mouth tape normally, leave it off until you can breathe comfortably through your nose again. How to sleep with a stuffy nose has more on getting through blocked nights, and our nose test is a quick way to check when you're back to normal.

What can you do for congestion instead?

The best approach depends on what's blocking your nose in the first place. A cold usually passes on its own. Allergies, a deviated septum or chronic sinus problems need a different plan, and a doctor can help work out which applies. Cleveland Clinic suggests switching treatment types before you reach the 3-day point, rather than waiting until rebound starts.

For ongoing allergy congestion, the Sleep Foundation notes that steroid nasal sprays reduce inflammation and mucus and can be used for allergic and non-allergic causes. Cleveland Clinic says steroid sprays can be taken daily for months or even year round, but ask your provider what's safe for you. For a closer look at the night-time side, see why your nose gets stuffy at night.

When should you see a doctor?

Cleveland Clinic advises seeing a healthcare provider if you've used a decongestant spray for as long as directed and still have symptoms. See one too if you can't get off the spray, if your nose is blocked most of the time, or if you snore loudly with gasping or pauses in your breathing.

* This content is for informational and educational purposes only and is not medical advice. It is not intended to diagnose, treat, cure or prevent any disease or health condition. Talk to a qualified healthcare provider about your health.