On this page · 9 sections
Upper respiratory combinations oral syrup (10 mg-6.25 mg/5 mL)

Codeine and promethazine

Generic name: codeine and promethazine

Brand names: Promethazine with Codeine, Codeine Phosphate-Promethazine HCl, Phenergan with Codeine, Promethazine HCl and Codeine Phosphate, Promethazine HCl with Codeine

Last updated November 2, 2026 0 views
Share

What is codeine and promethazine?

Codeine and promethazine is a combination medicine used to treat cold or allergy symptoms like a runny nose, sneezing, and cough.

Codeine and promethazine contains an opioid (narcotic) cough medicine, and may be habit-forming.

Codeine and promethazine may also be used for reasons not mentioned in this medication guide.

This section was rewritten for readability and reviewed for meaning.

How should I take codeine and promethazine?

Follow the instructions on your prescription label and read all medication guides. Never use this medicine in larger amounts or for longer than prescribed. Take this medicine only until your symptoms go away.

Never share opioid medicine with anyone else, especially someone with a history of drug abuse or addiction. MISUSE CAN CAUSE ADDICTION, OVERDOSE, OR DEATH. Keep the medicine in a secure place where others cannot access it. Selling or giving away opioid medicine is illegal.

Measure liquid medicine carefully. Use the dosing syringe that comes with it, or use a medicine dose-measuring device (not a kitchen spoon). Rinse after each use.

Call your doctor if your symptoms do not improve after 5 days of treatment.

If you need surgery or medical tests, inform the surgeon or doctor if you have taken a cough or cold medicine in the past few days.

Store at room temperature away from moisture, heat, and light. Keep track of your medicine. Be aware if anyone is using your medicine improperly or without a prescription.

Do not keep leftover medication. Just one dose can cause death in someone using this medicine accidentally or improperly. Read and carefully follow the instructions provided with this medicine on how to safely dispose of any unused portion.

This section was rewritten for readability and reviewed for meaning.

Warnings

MISUSE OF OPIOID MEDICINE CAN CAUSE ADDICTION, OVERDOSE, OR DEATH. Keep the medication in a place where others cannot get to it.

Taking opioid medicine during pregnancy may cause life-threatening withdrawal symptoms in the newborn.

Fatal side effects can occur if you use opioid medicine with alcohol, or with other drugs that cause drowsiness or slow your breathing.

This section was rewritten for readability and reviewed for meaning.

Before taking this medicine

You should not use codeine and promethazine if you are allergic to codeine or promethazine, or if you have:

  • asthma or severe breathing problems;
  • a stomach or bowel obstruction (including paralytic ileus);
  • narrow-angle glaucoma; or
  • if you are unable to urinate.

Do not use this medicine if you have used an MAO inhibitor in the past 14 days. A dangerous drug interaction could happen. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, rasagiline, selegiline, tranylcypromine, and others.

Codeine and promethazine is not approved for use by anyone younger than 12 years old.

Do not give this medicine to anyone younger than 18 years old who recently had surgery to remove the tonsils or adenoids.

Tell your doctor if you have ever had:

  • lung disease or breathing problems;
  • a head injury, brain tumor, or seizure;
  • constipation, a bowel obstruction, or stomach problems;
  • problems with your bile duct, pancreas, or adrenal gland;
  • an enlarged prostate or urination problems;
  • uncontrolled muscle spasms;
  • a blood cell disorder;
  • neuroleptic malignant syndrome (a severe nervous system reaction);
  • liver or kidney disease;
  • low blood pressure;
  • a drug addiction; or
  • if you have a fever and cough with mucus.

If you use opioid medicine while you are pregnant, your baby could become dependent on the drug. This can cause life-threatening withdrawal symptoms in the baby after it is born. Babies born dependent on opioids may need medical treatment for several weeks.

Do not breast-feed. Codeine can pass into breast milk and may cause drowsiness, breathing problems, or death in a nursing baby.

This section was rewritten for readability and reviewed for meaning.

Codeine and promethazine side effects

Get emergency medical help if you notice signs of an allergic reaction: hives; trouble breathing; swelling of your face, lips, tongue, or throat.

Opioid medicine can slow or stop your breathing, which can lead to death. A person taking care of you should seek emergency medical help if you have slow breathing with long pauses, blue lips, or if you are difficult to wake up.

codeine and promethazine can cause serious side effects. Stop using codeine and promethazine and call your doctor immediately if you experience:

  • noisy breathing, sighing, shallow breathing;
  • extreme drowsiness, confusion, feeling weak or limp;
  • uncontrolled muscle movements in your face, neck, arms, or legs;
  • feeling light-headed, as if you might faint;
  • a seizure;
  • problems with your adrenal glands--nausea, vomiting, loss of appetite, dizziness, increased tiredness or weakness; or
  • a severe nervous system reaction--very stiff (rigid) muscles, high fever, sweating, confusion, fast or irregular heartbeats, tremors.

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.

Common side effects of codeine and promethazine may include:

  • dry mouth, nausea, vomiting, constipation;
  • confusion, dizziness, headache;
  • drowsiness, lack of energy;
  • tremors, problems with coordination;
  • feeling anxious, restless, nervous, or irritable;
  • urination problems;
  • sweating; or
  • shortness of breath.

This is not a complete list of side effects and others may happen. Call your doctor for medical advice about side effects. You can report side effects to the FDA at 1-800-FDA-1088.

This section was rewritten for readability and reviewed for meaning.

Codeine and promethazine dosing information

Usual Adult Dose for Cough:

Promethazine 6.25 mg/ Codeine 10 mg per 5 mL: Average effective dose: 5 mL orally every 4 to 6 hours as needed Maximum dose: 30 mL (promethazine 37.5 mg; codeine: 60 mg) in 24 hours Comments: -Liquid preparations should be measured with an accurate milliliter measuring device. Uses: Temporary relief of coughs and upper respiratory symptoms associated with allergy or the common cold.

What happens if I miss a dose?

Since codeine and promethazine is taken as needed, you might not have a regular dosing schedule. If you miss a dose and it's almost time for your next dose, just skip the missed dose. Do not take two doses at once.

This section was rewritten for readability and reviewed for meaning.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222. A codeine overdose can be fatal, especially in a child or anyone using the medicine without a prescription. Overdose symptoms may include slow breathing and heart rate, severe drowsiness, muscle weakness, cold and clammy skin, pinpoint pupils, and fainting.

Avoid driving or operating machinery until you understand how codeine and promethazine will affect you. Dizziness or severe drowsiness can lead to falls or other accidents.

Do not drink alcohol. Dangerous side effects or death could occur.

This section was rewritten for readability and reviewed for meaning.

What other drugs will affect codeine and promethazine?

You may experience breathing problems or withdrawal symptoms if you start or stop taking certain other medicines. Inform your doctor if you are also using an antibiotic, antifungal medication, heart or blood pressure medication, seizure medication, or medicine to treat HIV or hepatitis C.

Opioid medication can interact with many other drugs and cause serious side effects or even death. Make sure your doctor is aware if you are also using:

  • cold or allergy medicines, bronchodilator asthma/COPD medication, or a diuretic ("water pill");
  • medicines for motion sickness, irritable bowel syndrome, or overactive bladder;
  • other narcotic medications, including opioid pain medicine or prescription cough medicine;
  • a sedative like Valium—diazepam, alprazolam, lorazepam, Xanax, Klonopin, Versed, and others;
  • drugs that can make you sleepy or slow your breathing, such as a sleeping pill, muscle relaxer, or medicine for mood disorders or mental illness; or
  • drugs that affect serotonin levels in your body, including a stimulant or medicine for depression, Parkinson's disease, migraine headaches, serious infections, or nausea and vomiting.

This list is not complete. Other drugs may interact with codeine and promethazine, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed here.

This section was rewritten for readability and reviewed for meaning.

Related medicines

Before you take this medicine: the information on this page is general and may not cover your personal circumstances. Read the label supplied with your medicine and ask a pharmacist or doctor if you are unsure, especially if you are pregnant, breastfeeding, taking other medicines or managing a long-term condition.
General medicine information Consumer-friendly language

Content is provided for education and is not medical advice. See our medical disclaimer.