Warm liquids, honey-based drinks, and plain water are the most effective things to drink when you have a cough. Staying hydrated keeps mucus thin and easier to clear, while certain ingredients like honey actively suppress the cough reflex. The best choice depends on whether your cough is dry and scratchy or wet and congested, but fluids in general are one of the simplest ways to find relief.
Why Fluids Matter for a Cough
Your airways are lined with a thin layer of liquid that helps move mucus upward and out of your lungs. When you’re sick or dehydrated, that liquid layer shrinks. Mucus becomes concentrated and sticky, and the tiny hair-like structures responsible for sweeping it along can’t do their job. Research in the American Journal of Respiratory and Critical Care Medicine found that as mucus concentration rises, clearance rates drop steadily, and at high enough concentration levels, mucus transport essentially stops.
Drinking fluids restores the water content of that mucus layer, making it easier to cough up or clear naturally. This is especially important with a productive (wet) cough, where thick secretions are sitting in your airways. But even a dry, irritated cough benefits from hydration, because fluid helps keep the throat lining moist and less reactive to triggers.
Honey in Warm Water or Tea
Honey is one of the best-studied natural cough remedies, and it consistently outperforms common over-the-counter cough medicines in clinical trials. A study of 139 children with upper respiratory infections found that just 2.5 milliliters of honey (about half a teaspoon) taken before sleep reduced cough frequency more effectively than dextromethorphan, the active ingredient in most cough syrups. Cough frequency scores dropped from about 4.1 to 1.9 in the honey group, compared to 4.1 to 3.1 in the control group receiving only supportive care.
Honey works through several mechanisms. Its thick, viscous texture coats and soothes irritated throat tissue. It also has mild antibacterial and anti-inflammatory properties. The simplest way to use it is to stir a tablespoon into warm water or herbal tea and sip it, particularly before bed when coughing tends to worsen. One important exception: never give honey to children under 12 months old, as it carries a risk of infant botulism.
Warm Water and Broth
Plain warm water is an underrated cough remedy. Warm liquids soothe the throat on contact and help loosen congestion. Research on nasal and airway clearance shows that both warm and room-temperature fluids improve the speed at which mucus moves through your airways, with clearance times improving from roughly 14 minutes down to about 9 minutes after hydration. The warmth itself provides comfort, but the hydration is what does the mechanical work of thinning mucus.
Broth, whether chicken, vegetable, or bone broth, adds the benefit of electrolytes and a small amount of salt, which can help your body retain the fluid you’re taking in. If you’re not eating much because of illness, broth also provides calories and nutrients without requiring effort to chew or swallow.
Ginger Tea
Ginger contains active compounds that relax the smooth muscle lining your airways. Lab research published in the American Journal of Respiratory Cell and Molecular Biology showed that these compounds reduce airway hyperresponsiveness, which is the twitchy, overreactive state your airways enter during a cold or respiratory infection. They work in part by changing how calcium moves in and out of muscle cells, which prevents the airways from clamping down and triggering a cough.
To make ginger tea, slice a thumb-sized piece of fresh ginger and steep it in boiling water for 10 to 15 minutes. You can add honey for a combined effect. The result is a drink that both relaxes tight airways and coats the throat. Ginger also has mild anti-inflammatory properties, which can help if your cough is driven by swollen, irritated tissue.
Thyme Tea
Thyme has a long history as a cough remedy in European herbal medicine, and clinical evidence supports it. A randomized, triple-blind trial in children with asthma-related coughs found that thyme syrup significantly reduced activity-induced coughing compared to a placebo. Thyme contains compounds that help relax bronchial muscles and reduce spasms in the airways, making it particularly useful for dry, hacking coughs.
You can brew thyme tea by steeping two teaspoons of dried thyme (or a few fresh sprigs) in a cup of hot water for five to ten minutes. It has a mild, savory flavor that pairs well with honey and lemon.
Marshmallow Root Tea
Marshmallow root contains a substance called mucilage, a gel-like compound that forms a protective film over irritated throat and airway tissue. This coating shields the inflamed lining from mechanical irritation (like the friction of coughing itself) and reduces the urge to cough. It’s especially well suited to dry coughs where the throat feels raw and scratchy.
Marshmallow root tea is available as pre-made tea bags or loose dried root. For best results, steep it in room temperature or lukewarm water for several hours (cold infusion extracts more mucilage), then warm it gently before drinking.
Pineapple Juice
Pineapple juice is a popular home remedy for coughs, and there’s some biological basis for its reputation. Pineapple contains bromelain, an enzyme that breaks down proteins and can help dissolve thick bronchial secretions. The enzymes work by breaking peptide bonds in mucus proteins, effectively thinning the mucus so it’s easier to clear.
However, the clinical evidence is modest. A study comparing a bromelain-and-honey combination to honey alone found that both groups improved at similar rates, with no statistically significant difference. Honey appeared to be driving the benefit. Pineapple juice is still a reasonable choice if you enjoy it, as it provides hydration, vitamin C, and some enzymatic activity, but it’s not a standout remedy on its own.
Warm Lemon Water With Honey
This classic combination works on multiple fronts. The warm water provides hydration and soothes the throat. Honey suppresses the cough reflex and coats irritated tissue. Lemon adds vitamin C and a mild astringent quality that can cut through the feeling of thick mucus at the back of the throat. It’s one of the simplest drinks to prepare when you’re feeling too sick to do much else: squeeze half a lemon into a mug of warm water, stir in a tablespoon of honey, and sip slowly.
What to Avoid While Coughing
Alcohol is a poor choice during a cough. It dehydrates you, irritates the throat lining, and suppresses immune function. Even small amounts can worsen inflammation in already-irritated airways.
Caffeine is less clear-cut. It does have a mild diuretic effect, meaning it increases urine production. But most research suggests that the fluid in a cup of coffee or tea offsets this effect at normal intake levels. If you’re a regular coffee drinker, a cup or two is unlikely to make your cough worse. High doses of caffeine, or caffeine in someone who doesn’t usually consume it, can tip the balance toward dehydration. When in doubt, choose herbal tea or water.
Very cold drinks can sometimes trigger coughing in people with sensitive airways, especially if the cough is asthma-related. Dairy milk doesn’t actually increase mucus production (this is a persistent myth), but its thick texture can feel coating in the throat in a way some people find uncomfortable during a cough. Sugary sodas and energy drinks offer no benefit and can irritate the throat further.
Matching Your Drink to Your Cough
For a dry, tickly cough where your throat feels raw, focus on coating and soothing drinks: honey in warm water, marshmallow root tea, or warm lemon-honey water. The goal is to calm the irritation that keeps triggering the cough reflex.
For a wet, productive cough with mucus you’re trying to clear, prioritize hydration and thinning agents: plain warm water, broth, ginger tea, or pineapple juice. These help loosen secretions so your body can move them out more efficiently. In either case, sipping frequently throughout the day matters more than drinking large amounts at once. Small, steady intake keeps your airways hydrated without overwhelming your stomach when you’re already feeling unwell.