Most coughs from colds and upper respiratory infections clear up on their own within one to three weeks, but the irritation in the meantime can be miserable, especially at night. The good news is that several simple remedies work as well as, or better than, over-the-counter cough medicines. Here’s what actually helps, what to skip, and when a cough needs more attention.
Honey Works as Well as Cough Syrup
Honey is one of the most effective cough remedies available, and it doesn’t require a trip to the pharmacy. A clinical trial published in JAMA Pediatrics found that honey performed just as well as dextromethorphan (the active ingredient in most OTC cough suppressants) at reducing nighttime cough frequency and improving sleep. Honey was also significantly better than no treatment at all, while dextromethorphan was not.
The likely reason: honey coats and soothes irritated throat tissue, and its thick consistency helps suppress the cough reflex. A half teaspoon is enough for young children aged 2 to 5, a full teaspoon for ages 6 to 11, and two teaspoons for older kids and adults. You can take it straight, stir it into warm water, or mix it into herbal tea. Never give honey to babies under 12 months because of the risk of infant botulism.
Warm Fluids and Humid Air
Staying well hydrated thins mucus, making it easier to clear from your airways. Warm liquids like tea, broth, or warm water with lemon do double duty: they hydrate and soothe inflamed throat tissue at the same time. There’s no magic ingredient here. The warmth itself is what provides relief by increasing blood flow to the throat and loosening congestion.
A humidifier can also help, particularly at night when dry indoor air aggravates coughing. Cool-mist and warm-mist humidifiers are equally effective at adding moisture to the air because by the time water vapor reaches your lower airways, it’s the same temperature regardless of how it started. For households with children, the Mayo Clinic recommends cool-mist models only, since hot water or steam from warm-mist units can cause burns if a child gets too close or knocks it over. Clean your humidifier regularly to prevent mold and bacteria buildup.
Saltwater Gargle for Throat Irritation
Gargling with salt water is a low-tech remedy that targets the source of many coughs: an inflamed, irritated upper throat. Mix a quarter to a half teaspoon of table salt into eight ounces of warm water, gargle for 15 to 30 seconds, and spit it out. The saltwater creates a hypertonic solution that draws excess fluid and debris out of swollen throat tissue, reducing inflammation. There’s also evidence that the chloride ions in saline help immune cells produce compounds that fight off infection. You can gargle several times a day as needed.
Choosing the Right OTC Medication
If you want to reach for something at the drugstore, it helps to match the product to your type of cough. Dextromethorphan is a cough suppressant that dials down the brain’s cough reflex. It’s best suited for a dry, hacking cough that isn’t producing mucus. Guaifenesin is an expectorant that thins mucus and loosens chest congestion. If your cough is wet and productive, guaifenesin helps you clear that mucus more easily rather than suppressing the urge to cough. Many combination products contain both, but if your cough is clearly one type, a single-ingredient product is the better choice.
One important caveat: these products have real limits, especially for children. The FDA recommends against giving OTC cough and cold medicines to children under 2 because of the risk of serious side effects, including slowed breathing. Manufacturers go further, voluntarily labeling products with a warning not to use them in children under 4. The FDA also warns against homeopathic cough products for young children, noting cases of seizures, allergic reactions, and difficulty breathing. For kids under 4, honey (if over 12 months), fluids, and humidity are safer and often more effective.
Herbal Remedies With Clinical Evidence
One herbal extract with a surprisingly strong evidence base is Pelargonium sidoides, a South African geranium sold under various brand names at pharmacies and health food stores. A meta-analysis covering over 2,000 participants found that nearly 89% of adults with acute bronchitis who took this extract saw their cough intensity drop by at least half within seven days, compared to about 48% on placebo. In children and adolescents, the numbers were 80% versus 41%. Even for common cold-related coughs, the extract outperformed placebo, with 57% achieving a 50% or greater reduction in cough intensity by day five.
Marshmallow root is another traditional remedy often found in cough teas and lozenges. It contains compounds called mucilages that form a gel-like coating over irritated throat tissue, which is why it’s classified as a demulcent. The clinical evidence for marshmallow root is thinner than for Pelargonium, but its soothing mechanism is well understood and it carries very few risks.
How to Stop Coughing at Night
Nighttime coughs are often worse for two reasons: lying flat allows mucus to pool in the back of the throat (post-nasal drip), and stomach acid can creep into the esophagus and irritate the airways (reflux). Both triggers are manageable with positioning changes.
Elevate the head of your bed by 6 to 8 inches using blocks or a wedge placed under the mattress. This is more effective than stacking pillows, which can bend your body at the waist and actually increase stomach pressure. If reflux is a factor, sleeping on your left side helps because gravity and the natural anatomy of your stomach and esophagus work together to keep acid where it belongs. Right-side sleeping, on the other hand, tends to worsen reflux episodes.
Taking a dose of honey right before bed, running a cool-mist humidifier in the bedroom, and keeping a glass of water on the nightstand for sips between coughing bouts can all make a noticeable difference. Avoid eating large meals within two to three hours of bedtime if reflux is contributing to your cough.
When a Cough Needs Medical Attention
Most coughs resolve within three weeks. A cough that persists beyond eight weeks in adults, or beyond four weeks in children under 15, is classified as chronic and warrants investigation. The most common culprits behind a chronic cough are post-nasal drip, asthma, and acid reflux, all of which are treatable once identified.
Certain symptoms alongside a cough signal something more urgent: coughing up blood, unexplained weight loss, fever that won’t break, significant shortness of breath, hoarseness, or excessive mucus production. Recurrent pneumonia or a long smoking history also raise the stakes. Any of these paired with a lingering cough point to causes that go beyond a simple cold and need professional evaluation.