What are the possible side effects of chlorpheniramine and codeine?
Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Opioid medicine can slow or stop your breathing, and death may occur. A person caring for you should seek emergency medical attention if you have slow breathing with long pauses, blue colored lips, or if you are hard to wake up.
Stop using this medicine and call your doctor at once if you have:
- noisy breathing, sighing, shallow breathing, breathing that stops during sleep;
- confusion, severe drowsiness;
- a light-headed feeling, like you might pass out;
- severe constipation; or
- adrenal gland problems --nausea, vomiting, loss of appetite, feeling very dizzy, weak, or tired.
Seek medical attention right away if you have symptoms of serotonin syndrome, such as: agitation, hallucinations, fever, sweating, shivering, fast heart rate, muscle stiffness, twitching, loss of coordination, nausea, vomiting, or diarrhea.
Serious side effects may be more likely in older adults and those who are debilitated.
Common side effects may include:
- dizziness, drowsiness, feeling light-headed;
- feeling short of breath;
- confusion, mood changes, lack of energy,
- feeling nervous, irritable, agitated, or restless;
- sleep problems;
- headache, vision problems;
- tremors, coordination problems;
- dry mouth;
- sweating; or
- nausea, vomiting, constipation, stomach pain, bloating.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.