What is good medicine for an infant with a cold?

None. No cold medication is recommended for children under the age of 6 years, especially an infant. Use of saline nasal spray with nasal aspiration is something that may help relieve nasal symptoms.
None. . Giving the baby pedialyte, using saline with nasal suction, and running a humidifier are all things that can help a baby as his/her immune system fights off the cold. And if you are nursing, keep it up, as your immune system can help the baby fight off a cold. .