You cannot safely give a 9-month-old any over-the-counter cough medicine. The FDA warns against cough and cold medications for children under 2 because they can cause serious, potentially life-threatening side effects, including slowed breathing. Instead, the best options for your baby are simple, non-medicated remedies: saline nose drops, extra fluids, and humid air.
Why Cough Medicine Is Off-Limits
Over-the-counter cough and cold products pose real dangers for infants. The FDA specifically warns they can slow breathing, which is especially risky in babies and young children. Manufacturers now voluntarily label these products with “do not use in children under 4 years of age,” going even further than the FDA’s under-2 cutoff.
This includes homeopathic cough products marketed as “natural.” Children under 4 who took homeopathic cough remedies have experienced seizures, allergic reactions, difficulty breathing, and dangerously low blood sugar, with some requiring hospitalization.
Honey is also not an option yet. While it’s a well-studied cough soother for older children, giving honey to any baby under 12 months can cause infant botulism, a severe form of food poisoning. Agave nectar, sometimes suggested as a honey alternative, has been studied in young children and performed no better than a placebo at reducing cough.
Saline Drops and Nasal Suctioning
A stuffy nose is often the reason a baby coughs, especially at night. Babies breathe primarily through their noses, so clearing mucus can make a noticeable difference. Saline nose drops are the single most effective tool you have at home.
Lay your baby on their back and put 3 to 4 drops of saline into each nostril. Hold your baby with their head tilted back for about a minute so the saline has time to thin the mucus. Then use a bulb syringe: squeeze the air out of the bulb first, gently place the tip into one nostril, and release the bulb so it pulls the mucus out. Squeeze the contents onto a tissue and repeat on the other side.
A few practical tips make this go more smoothly. Always suction the nose before feeding, not after, because suctioning on a full stomach can cause vomiting. Limit suctioning to four times a day at most so you don’t irritate the delicate lining of your baby’s nose. Many parents find that doing it before naps and bedtime gives the most relief.
Extra Fluids
Offer breast milk or formula more frequently than usual during a cough. You may need to give smaller amounts at each feeding if your baby is fussy or congested, but the goal is to keep total fluid intake up. Staying well-hydrated thins mucus and helps your baby recover faster.
Watch for signs that your baby is getting dehydrated: fewer wet diapers than usual, no tears when crying, a sunken soft spot on top of the head, sunken eyes, or unusual drowsiness and irritability. Any of these warrant a call to your pediatrician.
Humidity and Steam
Dry air makes coughing worse. Running a humidifier in your baby’s room, especially during sleep, adds moisture that soothes irritated airways. Always use a cool-mist humidifier rather than a warm-mist or steam vaporizer. Hot water or steam can burn a child who gets too close, and a spill from a warm-mist unit can cause serious burns. Empty the tank and dry all surfaces of the humidifier daily to prevent mold and bacteria from building up inside.
For quick relief, you can also sit in a closed bathroom with a warm shower running. The steam helps relax your baby’s airway and loosen phlegm. Hold your baby upright on your lap for 10 to 15 minutes and let them breathe the moist air.
Sleep Position and Comfort
Mucus pools in the back of the throat when a baby lies flat, which triggers more coughing at night. You should not put pillows or rolled towels in the crib (these are suffocation hazards), but you can hold your baby upright or at an incline after feedings and during coughing spells to help mucus drain. Some parents find that a brief upright cuddle before placing baby back in the crib on a firm, flat surface reduces overnight coughing episodes.
Signs That Need Medical Attention
Most infant coughs come from common colds and clear up on their own within a week or two. But certain signs mean your baby is struggling to breathe and needs to be seen right away.
- Retractions: The skin pulls inward below the neck, under the breastbone, or between the ribs with each breath. This means your baby is working much harder than normal to get air in.
- Nasal flaring: The nostrils spread wide open with each breath.
- Grunting: A short, low sound at the end of each exhale, which is the body’s attempt to keep the lungs inflated.
- Color changes: Bluish tint around the mouth, inside the lips, or on the fingernails. Pale or grayish skin also signals low oxygen.
- Wheezing or stridor: A tight, whistling sound when breathing out (wheezing) or a harsh sound when breathing in (stridor) suggest the airways are narrowing.
- Changes in alertness: Unusual sleepiness, limpness, or difficulty waking your baby can indicate low oxygen levels.
- Cool, clammy skin with sweating: Sweating on the head while the skin feels cool or clammy, rather than warm, is a sign of respiratory distress.
A cough that lasts longer than two weeks, comes with a fever above 100.4°F that persists for more than a couple of days, or is accompanied by fast or labored breathing also warrants a visit to your pediatrician. Trust your instincts. If your baby’s breathing looks or sounds different from a typical stuffy nose, getting them checked is always the right call.