See also Warning section.This combination medication is used to temporarily relieve symptoms caused by the common cold or allergies. Promethazine is an antihistamine that relieves watery eyes, itchy eyes/nose/throat, runny nose, and sneezing. Phenylephrine is a decongestant that helps relieve stuffy nose and ear congestion symptoms.Cough-and-cold products do not cure or shorten the length of the common cold and may cause serious side effects if not used properly. 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).
How to use Promethazine-Phenylephrine
Take this medication by mouth with or without food as directed by your doctor, usually every 4 to 6 hours as needed. This medication may be taken with food if stomach upset occurs. Drink plenty of fluids when you use this medication unless otherwise directed by your doctor.
Carefully measure the dose using a special measuring device/spoon. Do not use a household spoon because you may not get the correct dose.
Tell your doctor if your condition lasts for more than 1 week, if it gets worse, or if it occurs with a headache that doesn't go away, fever, or rash. These may be symptoms of a serious medical problem and should be checked by a doctor.
Remember that this medication has been prescribed because your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor right away if you have any serious side effects, including: mental/mood changes (such as confusion, hallucinations), ringing in the ears, shaking (tremors), difficulty urinating, vision changes (such as blurred/double vision), easy bruising/bleeding, uncontrolled behaviors/movements (such as fixed upward stare, neck twisting, tongue movements).
Get medical help right away if you have any very serious side effects, including: slow/shallow breathing, seizure.
This medication may rarely cause a very serious condition called neuroleptic malignant syndrome (NMS). Get medical help right away if you have any of the following symptoms: fever, muscle stiffness/pain/tenderness/weakness, severe tiredness, severe confusion, sweating, fast/irregular heartbeat, dark urine, signs of kidney problems (such as change in the amount of urine).
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Cough-and-cold products have not been shown to be safe or effective in children younger than 6 years. Do not use this product to treat cold symptoms in children younger than 6 years unless specifically directed by the doctor. Some products (including some long-acting tablets/capsules) are not recommended for use in children younger than 12 years. Do not use this product to make a child sleepy.
This product is not recommended for use in children younger than 2 years since it might cause serious (possibly fatal) slow/shallow breathing. In children 2 years and older, carefully follow the doctor's directions to use the lowest effective dose. Do not give more often than prescribed. Talk to the doctor or pharmacist before giving other cough-and-cold medication that might contain the same or similar ingredients that might also affect breathing. Get immediate medical help if you notice unusual slow/shallow breathing.
See also Warning section.
Before taking this medication, tell your doctor or pharmacist if you are allergic to promethazine or phenylephrine; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: blood/immune system problems (such as bone marrow depression), breathing problems (such as asthma, emphysema, sleep apnea), diabetes, glaucoma, heart problems (such as angina, irregular heartbeat), high blood pressure, liver problems, seizure, stomach/bowel problems (such as ulcer, blockage), overactive thyroid (hyperthyroidism), difficulty urinating (such as due to enlarged prostate).
This drug may make you dizzy or drowsy. Alcohol or marijuana (cannabis) can make you more dizzy or drowsy. Do not drive, use machinery, or do anything that needs alertness until you can do it safely. Children should be supervised to avoid injury during bicycle riding or other possibly hazardous activities. Limit alcoholic beverages. Talk to your doctor if you are using marijuana (cannabis).
This medication may make you more sensitive to the sun. Limit your time in the sun. Avoid tanning booths and sunlamps. Use sunscreen and wear protective clothing when outdoors. Tell your doctor right away if you get sunburned or have skin blisters/redness.
Liquid forms of this medication may contain sugar, alcohol, or aspartame. Caution is advised if you have diabetes, alcohol dependence, liver disease, phenylketonuria (PKU), or any other condition that requires you to limit/avoid these substances in your diet. Ask your doctor or pharmacist about using this product safely.
Children may be more sensitive to the side effects of this drug, especially slowed breathing and uncontrolled movements (See also Warning section). Young children may become excited/agitated instead of drowsy.
Older adults may be more sensitive to the effects of the drug, especially dizziness, drowsiness, confusion, constipation, trouble urinating, trouble sleeping, or fast/irregular heartbeat. Dizziness, drowsiness, and confusion can increase the risk of falling.
During pregnancy, this medication should be used only if clearly needed. Discuss the risks and benefits with your doctor.
It is unknown if this medication passes into breast milk. Consult your doctor before breast-feeding.
Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.
Taking MAO inhibitors with this medication may cause a serious (possibly fatal) drug interaction. Avoid taking MAO inhibitors (isocarboxazid, linezolid, metaxalone, methylene blue, moclobemide, phenelzine, procarbazine, rasagiline, safinamide, selegiline, tranylcypromine) during treatment with this medication. Most MAO inhibitors should also not be taken for two weeks before treatment with this medication. Ask your doctor when to start or stop taking this medication.
The risk of serious side effects (such as slow/shallow breathing, severe drowsiness/dizziness) may be increased if this medication is taken with other products that may also cause drowsiness or breathing problems. Tell your doctor or pharmacist if you are taking other products such as opioid pain or cough relievers (such as codeine, hydrocodone), alcohol, marijuana (cannabis), drugs for sleep or anxiety (such as alprazolam, lorazepam, zolpidem), muscle relaxants (such as carisoprodol, cyclobenzaprine), or other antihistamines (such as cetirizine, diphenhydramine).
This medication may interfere with certain lab tests (such as some pregnancy tests, blood sugar tests, allergy skin test), possibly causing false test results. Make sure lab personnel and all your doctors know you use this drug.
If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include: confusion, slowed breathing, seizure.
Do not share this medication with others.
If you are taking this medication on a regular schedule and miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose to catch up.
Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.
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CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgment of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment.