Honey is the most well-studied natural cough suppressant, and for upper respiratory coughs in children over 12 months, it performs as well as or better than the active ingredient in most over-the-counter cough syrups. But honey isn’t the only option. Several herbs, foods, and simple home strategies can calm a cough by coating irritated tissue, relaxing airway muscles, or raising the threshold for what triggers the cough reflex in the first place.
Honey: The Strongest Evidence
A single dose of honey before bedtime reduces cough frequency and improves sleep quality in children with upper respiratory infections. Multiple clinical studies have compared honey head-to-head with dextromethorphan (the “DM” in most pharmacy cough syrups) and found that the drug was not superior to placebo for nighttime symptom relief, while honey consistently outperformed both. Honey appears to work by coating the throat and reducing mucus secretion, which calms the nerve endings that trigger coughing.
A spoonful of raw honey, or honey stirred into warm water or herbal tea, is the simplest way to use it. One important safety rule: never give honey to a child younger than 12 months. Honey can contain spores that cause infant botulism, a severe form of food poisoning. After age one, the gut is mature enough to handle those spores without issue.
Menthol and Peppermint
Menthol, the cooling compound in peppermint and eucalyptus, suppresses cough by activating cold-sensing receptors in the airways. When those receptors fire, they raise the irritation threshold your body needs to reach before it triggers a cough. In lab studies, inhaling menthol vapor significantly increased the concentration of irritant required to provoke coughing. That’s why a mentholated lozenge or a few drops of peppermint oil in a bowl of steaming water can bring quick, noticeable relief.
You can also brew strong peppermint tea and breathe in the steam before drinking it. The effect is temporary, usually lasting 20 to 40 minutes, but it stacks well with other remedies like honey.
Marshmallow Root and Slippery Elm
Marshmallow root contains polysaccharides that dissolve into a thick, slippery gel when mixed with water. This gel forms a protective film over inflamed throat tissue almost immediately, shielding irritated cells from mechanical irritation and reducing the dry, scratchy sensation that provokes coughing. The coating also has mild anti-inflammatory and antioxidant effects on the tissue underneath. Slippery elm bark works through a nearly identical mechanism, producing its own mucilage layer.
Both are available as teas, lozenges, and syrups. For a dry, ticklish cough (as opposed to a deep, wet cough), these mucilage-based remedies tend to be especially effective because the cough is driven by surface irritation rather than deep congestion.
Thyme and Ivy Leaf
A combination of thyme herb and ivy leaf extract is one of the most widely used herbal cough treatments in Europe, where it’s available as a licensed syrup. Ivy leaf helps thin mucus in the airways, which can improve breathing and make a productive cough more efficient. Thyme contributes mild antimicrobial and spasmolytic effects, meaning it helps relax the muscles that tighten during a coughing fit. Clinical trials in adults with acute bronchitis and productive cough have confirmed that the thyme-ivy combination reduces cough frequency and duration compared to placebo. Separate studies in children and adolescents found similar benefits with a good safety profile.
If you can’t find a standardized syrup, thyme tea (steeped for 10 minutes with a lid on to trap the volatile oils) is a reasonable substitute for mild coughs.
Ginger for Airway Relaxation
Ginger’s active compounds relax airway smooth muscle, the bands of tissue that constrict during coughing and wheezing. Lab research on human airway cells found that three specific ginger components each enhanced muscle relaxation through a pathway that involves blocking an enzyme responsible for keeping muscles contracted. One compound, 6-shogaol (more concentrated in dried ginger than fresh), showed the strongest effect. This makes ginger particularly relevant for coughs accompanied by chest tightness or mild bronchospasm.
Fresh ginger sliced into hot water with honey and lemon is the classic preparation. Ginger tea bags work too, though fresh root delivers higher concentrations of the active compounds.
Salt Water Gargle
Gargling with salt water is one of the oldest and simplest cough remedies, and it works for a straightforward reason: the salt draws excess fluid out of swollen throat tissue, temporarily reducing inflammation and loosening mucus. A concentration of roughly 2% sodium chloride (about half a teaspoon of table salt in a cup of warm water) is a commonly used ratio. At that concentration, salt also strengthens the mucin barrier in your throat, which may help block further irritation from pathogens. Gargle for 15 to 30 seconds and spit. Repeating this three or four times a day can keep throat irritation in check between doses of other remedies.
Humidity and Steam
Dry indoor air irritates the lining of your nose and throat, which lowers the threshold for coughing. The Mayo Clinic recommends keeping indoor humidity between 30% and 50%. Below 30%, mucous membranes dry out and become more reactive. Above 50%, you risk condensation that encourages mold, dust mites, and bacteria, all of which can worsen a cough over time.
A cool-mist humidifier in the bedroom is the simplest fix during winter months when heating systems strip moisture from the air. For immediate relief, sitting in a bathroom with a hot shower running for 10 to 15 minutes achieves a similar effect. Steam loosens mucus and soothes inflamed tissue, which is why coughs often feel worse at night in dry rooms and better in the morning after a shower.
Probiotics for Prevention
Probiotics won’t stop a cough that’s already underway, but regular use may reduce how often you get the respiratory infections that cause coughing in the first place. A systematic review of clinical trials found that probiotic groups had roughly 42% fewer local respiratory symptoms (sore throat, cough, nasal congestion) compared to control groups. Several specific strains reduced the incidence and duration of colds and flu-like illness, and one trial found that probiotics lowered severe lower respiratory infections by 35%.
The strains with the most evidence include varieties of Lactobacillus found in fermented dairy products, kimchi, and supplement capsules. The benefits appear to come from immune modulation, specifically an increase in the body’s antiviral signaling, rather than a direct effect on cough receptors.
Combining Remedies
These options aren’t mutually exclusive, and combining a few of them is often more effective than relying on one. A practical nighttime routine might look like: a salt water gargle, a cup of thyme or peppermint tea with honey, and a humidifier running in the bedroom. During the day, menthol lozenges or marshmallow root tea can bridge the gaps. For a productive, chesty cough, lean toward ginger, thyme, and ivy leaf. For a dry, ticklish cough, prioritize honey, marshmallow root, and humidity.
Most acute coughs from colds or upper respiratory infections resolve within two to three weeks. A cough lasting longer than eight weeks is classified as chronic and typically has an underlying cause, such as acid reflux, postnasal drip, or asthma, that natural remedies alone won’t resolve.