A common Decongestant may not actually work, scientific advisers say, and CVS is acting preemptively by pulling some medications that contain it. CVS is pulling some cold and flu medicine from store shelves that contain Phenylephrine, a common decongestant which has been found be ineffective at actually decongesting or "unstuffing" your nose.Last month, a committee that advises the US Food and Drug Administration found that -- while it's still safe -- phenylephrine is ineffective when taken orally. The FDA itself hasn't yet issued new rules on the ingredient, which is included in many popular medications like some NyQuil, Mucinex and more name- and store-brand kinds of oral medications. But while phenylephrine is in a lot of medication, many that contain it have other active ingredients. In a statement, CVS said that it's pulling only a "small number" of medications that contain phenylephrine as the only active ingredient (think Sudafed PE). The company said it "will continue offering many other oral cough and cold products to meet consumer needs." Other big pharmacy chains, including Walmart and Walgreens, didn't immediately respond to a request for comment on whether they plan to pull medications that contain the ingredient, which has been deemed ineffective by many ahead of any official action by the FDA. But phenylephrine isn't the only decongestant, and many people use over-the-counter decongestants for milder symptoms of a virus or to treat their seasonal allergies. This makes them an easy first-line treatment. And according to Dr. Geoffrey Rutledge, a physician and chief medical officer and co-founder of the telemedicine site HealthTap, having choices when you're feeling miserable can be one of the most important parts of treatment. Medications that contain phenylephrine often contain other active ingredients, they can lessen symptoms aside from decongestion. But that doesn't mean phenylephrine works as a decongestant, Rutledge says, especially compared to its behind-the-counter cousin, pseudoephedrine. "As a physician in practice, I have never recommended patients use phenylephrine products," he said. Instead, he directs them behind the counter for a more effective decongestant, or to other medications if the source of congestion is allergies.Phenylephrine is a decongestant that works by restricting the blood vessels in your nose. It's found in common medications like Sudafed PE (not regular Sudafed), Theraflu, Tylenol Sinus, Advil Congestion, NyQuil Severe Cold and Flu products and more. These are medications that don't require a prescription, are easily available on store shelves and are typically meant to treat other symptoms of cold or flu in addition to congestion.There's another oral decongestant that works similarly, pseudoephedrine, and research has shown for a while that it's more effective than phenylephrine, according to Dr. Stacia Woodcock, a pharmacist and pharmacy editor at GoodRx."The idea that phenylephrine doesn't work isn't a new one for most health care professionals," Woodcock said in an email. "Pseudoephedrine (Sudafed) has clearly been the superior decongestant for quite some time." Pseudoephedrine, however, faces more restrictions because it's also a main ingredient used to make methamphetamine. This means that while phenylephrine-containing Sudafed PE is available on store shelves, you probably have to ask a pharmacist and show ID to purchase regular Sudafed, which contains pseudoephedrine. There are also limits on how much you can buy at once. (Other names for pseudoephedrine medication include 12 Hour Cold Maximum Strength.) As a result of the restrictions on pseudoephedrine, "most cough and cold medication manufacturers turned to phenylephrine to replace pseudoephedrine in their OTC products," Woodcock said. "This allowed people to purchase them when the pharmacy is closed, if they'd reached their monthly limit on pseudoephedrine products, or if they didn't have the necessary ID to purchase it."While pseudoephedrine is considered safe for most adults when taken as directed, it also works by constricting blood vessels and acts more like a stimulant. This means it's a good idea to talk to your doctor before taking a decongestant (especially pseudoephedrine) if you have certain health conditions like high blood pressure, a heart problem, glaucoma, diabetes or if you're pregnant or breastfeeding. A certain type of antidepressant, monoamine oxidase inhibitors (MAOIs), may also interact with pseudoephedrine and phenylephrine. Read more: What to Know About the New COVID Vaccines This Fall Sudafed PE is the phenylephrine-containing medicine you can pick up without talking to a pharmacist. (The "PE" stands for phenylephrine.) Regular Sudafed contains pseudoephedrine, and it's what you want if you're looking for a decongestant that works, according to Rutledge. You'll have to ask a pharmacist for it, though. Sudafed is just one of many brand names of medication that contain phenylephrine. Oral decongestants containing phenylephrine have been on the market for decades. And according to survey information compiled for the FDA meeting by the Consumer Healthcare Products Association, many people are happy with products containing phenylephrine and say they've found a benefit. According to both Woodcock and Rutledge, it's fine to keep using products containing phenylephrine if you want to or you find they help. Especially because you're still probably getting the benefits from the other ingredients in the medication. Nyquil contains phenylephrine for decongestion, but it also contains ingredients to reduce fever and pain and suppress cough, which may still provide relief and ease your symptoms during the worst days of your illness. The same is true for other medications with phenylephrine.Beyond the effectiveness of other ingredients, we shouldn't overlook the fact that someone expecting relief from their medication is more likely to get it, says Rutledge. He referred to this dynamic-duo effect on phenylephrine as "the power of placebo and the power of the other ingredients."The FDA committee considered evidence that suggested phenylephrine itself is no better than a placebo, or "dummy" medication used to test the effectiveness of something. But there are different angles to the placebo effect, Rutledge says. "It's been shown time and time again if you believe something will work, there will be a subjective measurable benefit," he noted, adding that patient outcomes and treatment follow-throughs are better when patients believe in what their doctors are telling them.Read more: Here's Where You Can Still Find Free COVID TestingNasal sprays containing phenylephrine are still considered effective decongestants, Woodcock said, because it goes right to the source of congestion and is better-absorbed by the body. They may also contain oxymetazoline. But nasal sprays come with a "big caveat," she said. You can only use the spray for a few days or risk "rebound congestion" that's difficult to get rid of and can last up to a year. And if you want an oral decongestant that works, Rutledge said, ask for the pseudoephedrine. Common side effects can include shakiness or restlessness. For congestion caused by allergies, you'll need to target your symptoms a little differently, Rutledge says. A nasal-inhaled steroid like Flonase is better for long-term use by allergy sufferers because "rather than treating the symptoms, the steroid actually blocks the immune reaction in the nose," he said. Antihistamines are also used by people with allergies, but know that antihistamines aren't a decongestant, Rutledge said. They work by blocking the effect of histamine, which your body releases in response to an allergy. This is why one simple test for helping you figure out whether you have allergies or a virus is by seeing if your symptoms improve when you take an antihistamine. Read more: These 5 Sleep Hacks Will Help You Beat the Flu Personal Care Sleep Fitness Nutrition Medical and Mental Health