This combination medication is used to treat symptoms caused by the
common cold, flu, allergies, or other breathing illnesses (e.g.,
sinusitis, bronchitis). Promethazine is an antihistamine that relieves
watery eyes, itchy eyes/nose/throat, runny nose, and sneezing.
Phenylephrine is a decongestant that relieves stuffy nose symptoms.
Codeine is an opioid cough suppressant (antitussive) that affects a
certain part of the brain, reducing the urge to cough.Do not use this
product in children younger than 18 years. There is a risk of serious
(rarely fatal) side effects, such as breathing problems.Cough-and-cold
products do not cure colds. Cough due to a common cold often does not
need to be treated with medicine. Ask your doctor or pharmacist about
other ways to relieve cough and cold symptoms, such as drinking enough
fluids, using a humidifier, or saline nose drops/spray.