Over-the-counter cough medicines are not safe for a 10-month-old. The FDA warns against giving any OTC cough or cold medicine to children under 2 due to the risk of serious, potentially life-threatening side effects like slowed breathing. Instead, the safest and most effective options are simple home measures: saline nose drops, gentle suction, extra fluids, and humid air.
Why Cough Medicine Is Off Limits
The FDA explicitly advises against OTC cough and cold products for children younger than 2. These medicines can cause dangerous side effects in infants, including slowed breathing. Manufacturers have voluntarily added labels stating “do not use in children under 4 years of age,” which means even the products you see marketed for children are not intended for your baby.
Honey is another common cough remedy that is not safe at this age. Children under 12 months should never have honey in any form, including mixed into food or water. Honey can contain spores that cause infant botulism, a severe type of food poisoning.
Saline Drops and Nasal Suction
Most infant coughs are triggered or worsened by mucus dripping down the back of the throat. Clearing your baby’s nose is often the single most helpful thing you can do. Saline nose drops thin the mucus so it’s easier to remove, and a bulb syringe pulls it out.
Here’s how to do it: lay your baby on their back and place 3 to 4 drops of saline into each nostril. Hold their head back for about a minute to let the saline work. Then squeeze all the air out of the bulb syringe, gently place the tip into one nostril, and release the bulb to suction the mucus out. Squeeze the contents onto a tissue, then repeat on the other side. Wipe gently around the nose afterward to prevent skin irritation.
Try to suction before feedings, since a stuffy nose makes it harder for babies to eat. Limit suctioning to no more than four times a day so you don’t irritate the nasal lining. Wash the dropper and bulb syringe after every use, and throw away any leftover saline solution.
Extra Fluids Make a Real Difference
Staying hydrated is one of the most effective things for a coughing baby. Fluids help thin mucus and keep airways moist, which can ease coughing. At 10 months, your baby’s main fluids are still breast milk or formula, so offer both more frequently and for longer stretches than usual.
Since your baby is likely eating some solid foods at this age, you can also offer small amounts of water between meals. Warm clear broth or soup can soothe the throat and add hydration. Signs that your baby is getting enough fluid include wet diapers at their usual frequency, tears when crying, and a moist mouth.
Using a Humidifier Safely
Adding moisture to the air can help loosen congestion and calm a cough, especially at night. A cool-mist humidifier is the safer choice for a baby’s room. Warm-mist humidifiers and steam vaporizers pose a burn risk if your child gets close or if hot water spills.
The catch with humidifiers is that they need daily cleaning. Standing water inside a cool-mist unit can grow bacteria and mold, which the machine then sprays into the air your baby breathes. Empty the tank completely every day, dry all surfaces, and refill with distilled or purified water to reduce mineral buildup. Place the humidifier near the crib but out of reach.
Safe Sleep With a Cough
It’s tempting to prop your baby up so they can breathe more easily while sleeping. Don’t. The American Academy of Pediatrics says babies should always sleep flat on their backs on a firm, even surface, even when they’re sick. No pillows, rolled towels, or inclined mattresses.
When a baby’s head is propped up or placed on an incline, their neck can bend forward or fall to the side, creating a kink in the airway that actually makes breathing harder. The Consumer Product Safety Commission has banned inclined sleepers for this reason. Instead, run the humidifier and suction your baby’s nose before laying them down. That combination often helps more than elevation would.
What the Cough Sounds Like Matters
A wet, phlegmy cough that comes with a runny nose and mild fussiness is usually a standard cold. These are the most common coughs in 10-month-olds, and they respond well to the home measures described above.
A harsh, barking cough that sounds like a seal is characteristic of croup, which happens when swelling narrows the airway near the vocal cords. Croup often starts as an ordinary cold and gets worse at night. Cool night air or sitting in a steamy bathroom for a few minutes can sometimes ease the barking, but a baby with croup who is struggling to breathe needs medical attention.
A cough paired with rapid breathing, wheezing, or poor feeding in a baby this age can signal bronchiolitis, commonly caused by RSV. Bronchiolitis tends to peak around days 3 to 5 of illness before slowly improving.
How Long a Cough Normally Lasts
Infant coughs last longer than most parents expect. A large review of studies on childhood respiratory infections found that a common cold takes up to 15 days to fully resolve, and an acute cough can linger for as long as 25 days in some children. Bronchiolitis can take up to 21 days. So if your baby is still coughing after a week but otherwise eating, sleeping, and acting reasonably normal, that timeline is typical.
Signs That Need Medical Attention
Watch your baby’s breathing, not just their cough. The red flags are physical and visible: nostrils flaring wide with each breath, skin pulling inward between the ribs or at the base of the throat, and fast shallow breathing. A baby who is unusually limp or difficult to wake, refuses to drink, or has a fever above 104°F needs to be seen promptly. The same goes for any cough that produces a barking sound with audible straining to inhale, or lips and fingernails that look bluish or gray.
If the cough has lasted more than two to three weeks with no improvement, or if it keeps getting worse instead of gradually better, that pattern is worth a call to your pediatrician even without the dramatic warning signs.