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Phenergan Patient Information including How Should I Take
In this Article
- What is oral promethazine (Phenergan)?
- What are the possible side effects of oral promethazine (Phenergan)?
- What is the most important information I should know about oral promethazine (Phenergan)?
- What should I discuss with my doctor before taking oral promethazine (Phenergan)?
- How should I take oral promethazine (Phenergan)?
- What happens if I miss a dose (Phenergan)?
- What happens if I overdose (Phenergan)?
- What should I avoid while taking oral promethazine (Phenergan)?
- What other drugs will affect oral promethazine (Phenergan)?
- Where can I get more information?
What should I discuss with my doctor before taking oral promethazine (Phenergan)?
Promethazine should not be given to a child younger than 2 years old. Promethazine can cause severe breathing problems or death in a child younger than 2. Carefully follow your doctor's instructions when giving this medicine to a child of any age.
Do not use this medication if you have severe asthma, emphysema, or other breathing problem, or if you are allergic to promethazine or other phenothiazines such as chlorpromazine (Thorazine), fluphenazine (Permitil), perphenazine (Trilafon), prochlorperazine (Compazine, Compro), thioridazine (Mellaril), or trifluoperazine (Stelazine).
If you have certain conditions, you may need a dose adjustment or special tests to safely use this medication. Before you take promethazine, tell your doctor if you have:
- a history of seizures;
- heart disease or high blood pressure;
- liver or kidney disease;
- severe asthma, emphysema, chronic obstructive pulmonary disease (COPD) or other breathing problem;
- sleep apnea (breathing stops during sleep);
- a stomach ulcer or digestive obstruction;
- bone marrow depression;
- adrenal gland tumor (pheochromocytoma);
- enlarged prostate or problems with urination;
- low levels of calcium in your blood (hypocalcemia); or
- if you have ever had a serious side effect while using promethazine or any other phenothiazine.
FDA pregnancy category C. It is not known whether promethazine is harmful to an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant during treatment.
It is not known whether promethazine passes into breast milk or if it could harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.
Older adults may be more likely to have side effects from this medication.
How should I take oral promethazine (Phenergan)?
Take this medication exactly as prescribed by your doctor. Do not take it in larger amounts or for longer than recommended. Follow the directions on your prescription label.
Your doctor may occasionally change your dose to make sure you get the best results from this medication.
Promethazine can be taken with or without food or milk.
Measure liquid medicine with a marked measuring spoon or medicine cup, not with a regular table spoon. If you do not have a dose-measuring device, ask your pharmacist for one.
Call your doctor if your symptoms do not improve, or if they get worse while taking promethazine.
This medication can cause you to have unusual results with certain medical tests. Tell any doctor who treats you that you are using promethazine.
Store this medication at room temperature away from moisture, heat, and light.
Additional Phenergan Information
- Phenergan Drug Interactions Center: promethazine oral
- Phenergan Side Effects Center
- Phenergan Overview including Precautions
- Phenergan FDA Approved Prescribing Information including Dosage
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