The best thing to take for a cough depends on what kind of cough you have. A dry, tickling cough calls for a cough suppressant, while a wet, mucus-producing cough responds better to an expectorant that helps you clear the phlegm. In many cases, simple home remedies like honey or a humidifier work just as well as over-the-counter medications.
Dry Cough vs. Wet Cough: Pick the Right Medicine
Over-the-counter cough medicines fall into two main categories, and grabbing the wrong one can actually work against you.
Cough suppressants contain dextromethorphan (often labeled “DM” on the box). These work by reducing the cough reflex itself, making them ideal for a dry, hacking cough that isn’t producing mucus. The kind that keeps you up at night or leaves your throat raw. For adults, the maximum daily limit is 120 mg of dextromethorphan in a 24-hour period.
Expectorants contain guaifenesin and do the opposite. Instead of stopping your cough, they thin out mucus so each cough is more productive. If your chest feels heavy and congested, an expectorant helps you clear that buildup faster. Adults can safely take up to 2,400 mg of guaifenesin per day. Drink plenty of water alongside it, since the drug works by pulling fluid into your airways to loosen mucus.
Many combination products contain both ingredients. These are fine for a cough that shifts between dry and productive throughout the day, but if your cough is clearly one type, a single-ingredient product lets you target it more precisely without taking medication you don’t need.
Honey: A Surprisingly Effective Option
Honey performs about as well as dextromethorphan for cough relief. A systematic review published in BMJ Evidence-Based Medicine pooled data from 137 patients and found no significant difference between honey and dextromethorphan for cough frequency or cough severity. Honey likely works by forming a soothing coating over irritated throat tissue, calming the nerve endings that trigger your cough reflex.
A spoonful of honey, straight or stirred into warm water or tea, is a reasonable first-line option, especially before bed. It’s particularly useful for people who want to avoid medication side effects like drowsiness. One important caveat: never give honey to children under 12 months old due to the risk of botulism.
Home Remedies That Actually Help
Several non-medication approaches can meaningfully reduce coughing, and they work well alongside anything else you’re taking.
Saltwater gargle: Mix a quarter to half teaspoon of table salt into eight ounces of warm water and gargle for 15 to 30 seconds. The salt creates a hypertonic solution that draws excess fluid and debris out of swollen throat tissue, reducing irritation. The chloride ions also support your immune cells in producing compounds that help fight infection.
Humidifier: Dry air irritates already-inflamed airways and thickens mucus, making coughs worse. Adding moisture to your room can ease congestion, calm a sore throat, and reduce coughing. A cool mist humidifier is the safest choice. The American Academy of Pediatrics specifically recommends cool mist over warm steam vaporizers, which pose a burn risk.
Warm fluids: Tea, broth, and warm water with lemon all help thin mucus and soothe irritated tissue. Staying well-hydrated in general keeps mucus from becoming thick and sticky, which makes coughing more productive and less painful.
Prescription Cough Medicine
When over-the-counter options aren’t enough, doctors sometimes prescribe benzonatate (sold as Tessalon Perles). It works differently from dextromethorphan. Instead of acting on the brain’s cough center, it numbs the stretch receptors in your lungs and airways, reducing the cough reflex at its source. It’s typically reserved for persistent, disruptive coughs that haven’t responded to standard remedies. The capsules must be swallowed whole, since chewing or dissolving them can numb your mouth and throat.
For coughs driven by postnasal drip, allergies, or acid reflux, the most effective treatment targets the underlying cause rather than the cough itself. Antihistamines help with allergy-related coughs, while acid-reducing medications address reflux-triggered coughing.
Cough Medicine and Children
The rules are stricter for kids. The FDA warns against giving any over-the-counter cough and cold medicine to children under 2, citing the risk of serious and potentially life-threatening side effects. Manufacturers have voluntarily extended that warning to children under 4. The FDA also urges parents not to use homeopathic cough products in children younger than 4, noting no proven benefits for these remedies.
For young children with a cough, honey (for those over 12 months), a cool mist humidifier, and plenty of fluids are the safest approaches. For children between 4 and 12, follow package directions carefully, since doses are weight- and age-dependent.
Signs Your Cough Needs Medical Attention
Most coughs from a cold or upper respiratory infection clear up within a week. The Mayo Clinic recommends seeing a doctor if your cough persists beyond that or comes with any of these symptoms:
- Difficulty breathing
- Painful or difficult swallowing
- Thick green or yellow mucus
- Blood in your mucus
- Wheezing
- High or persistent fever
A cough lasting more than three weeks without improvement, even without these red flags, is worth getting checked. Chronic coughs can signal asthma, reflux, or lingering infections that respond well to targeted treatment once identified.