What is Phenergan?
Phenergan is a medication that contains promethazine, an active ingredient known for its antihistamine and sedative properties. It is commonly used to promote sleep by blocking specific receptors in the brain. This not only helps to reduce allergy symptoms but also creates a calming effect, making it useful for those who need help with relaxation and managing sleep disturbances linked to allergies. Because of its strong sedative impact, Phenergan should be used carefully under medical supervision to ensure it does not impair activities that require full alertness.
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What is the Active Ingredient in Phenergan?
Active Ingredient Details
Phenergan’s active ingredient is promethazine.
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Who Should Not Use Phenergan?
Avoid Using Phenergan Tablets If:
- The patient is under 6 years old.
- You are allergic to promethazine hydrochloride or any other ingredients in this medication. Refer to the patient information leaflet for signs of an allergic reaction, such as rashes, difficulty swallowing or breathing, and swelling of the lips, face, throat, or tongue.
- You are currently taking or have taken a monoamine oxidase inhibitor (MAOI) for depression within the last 14 days.
- The patient is in a coma or experiencing severe dizziness, drowsiness, or headache.
If any of these conditions apply, or if you are unsure, consult your doctor or pharmacist before using Phenergan Tablets.
Warnings and Precautions
Consult with your doctor or pharmacist before taking Phenergan Tablets if you:
- Have respiratory problems, including asthma, chest tightness, or bronchitis.
- Suffer from seizure disorders, such as epilepsy.
- Experience an allergic reaction to this medication; seek immediate medical help.
- Have serious heart conditions or a family history of heart disease.
- Experience an irregular heartbeat.
- Develop a fever or infection that might require blood tests.
- Have liver or kidney issues.
- Suffer from stomach blockage or difficulty urinating.
- Have hearing impairments.
- Are diagnosed with narrow-angle glaucoma.
- Have had or are suspected to have Reye's Syndrome, which can occur after a viral illness and is marked by vomiting and confusion.
Additional Considerations
- Sun Exposure: Phenergan Tablets can increase your skin’s sensitivity to sunlight. Avoid direct sun exposure while taking this medication.
- Diagnostic Tests: Phenergan may alter the results of some tests, including certain pregnancy tests and skin tests. It is advisable not to take this medication for at least 3 days before undergoing a skin test.
- Do not administer Phenergan Tablets to children under 6 years old or to individuals who have difficulty swallowing tablets due to the risk of choking.
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What Are the Side Effects of Phenergan?
Phenergan Tablets, like any medication, may cause side effects, though not everyone will experience them. If you notice any severe reactions, stop taking Phenergan immediately and seek medical attention.
Severe Side Effects
- Allergic Reactions: Life-threatening reactions may occur soon after taking the medication or days later. Symptoms include rashes, itching, difficulty breathing, swelling of the face, lips, throat, or tongue, cold and clammy skin, palpitations, dizziness, weakness, or fainting.
- Liver Problems: Signs include yellowing of the skin or eyes (jaundice) and dark urine.
- Neuromuscular Symptoms: These can include muscle stiffness, shaking, unusual tongue movements, facial muscle spasms, uncontrolled facial movements, eye rolling, or trembling.
- Heart Issues: A very fast, irregular, or forceful heartbeat (palpitations).
- Blood Disorders: General weakness, frequent infections (especially throat infections), and fever may indicate blood changes such as agranulocytosis or eosinophilia, which are detected via blood tests.
- Thrombocytopenia: A reduction in blood platelets can lead to bleeding and bruising.
- Chronic Fatigue: Persistent tiredness, which may be due to anemia.
- Behavioral Changes: Aggression, hallucinations, and hyperactivity, particularly in children.
Other Side Effects
If any of the following side effects become serious or persist for more than a few days, consult your doctor or pharmacist:
- Dry mouth, blurred vision, or difficulty urinating.
- Drowsiness, fatigue, disorientation, nightmares, headaches, or restlessness.
- Loss of appetite, indigestion, or stomach irritation.
- Dizziness, lightheadedness, or fainting (hypotension).
- Confusion, particularly in elderly individuals.
- Increased sensitivity to sunlight; if this occurs, avoid direct sunlight and sun lamps.
- Restless Legs Syndrome, an overwhelming urge to move your legs.
Reporting Side Effects
If you experience any side effects, discuss them with your doctor, pharmacist, or nurse. This includes any reactions not listed in the medication leaflet. You can also report side effects directly via the Yellow Card Scheme at www.mhra.gov.uk/yellowcard or through the MHRA Yellow Card mobile app. Reporting side effects helps improve the safety information on this medication.
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Phenergan FAQs
What is Phenergan Used For?
Phenergan is mainly used to relieve allergy symptoms such as itching, a runny nose, and hives. It is also effective in preventing motion sickness, treating nausea and vomiting, providing sedation, and serving as a short-term remedy for insomnia.
How Should Phenergan Be Taken?
- Phenergan is available as tablets or syrup.
- Follow the dosage instructions provided by your healthcare provider or as stated on the packaging.
Can Children Take Phenergan?
- Phenergan should not be used in children under 6 years old due to the risk of severe breathing problems.
- For children over 6, the dosage will depend on their age and weight.
Are There Any Medications That Should Not Be Taken with Phenergan?
- Phenergan should not be taken with monoamine oxidase inhibitors (MAOIs) or other medications that cause drowsiness unless advised by your doctor.
What Are the Common Side Effects of Phenergan?
- Common side effects include drowsiness, dizziness, dry mouth, blurred vision, and constipation.
- If these effects persist or worsen, contact your healthcare provider.
Can Phenergan Be Used During Pregnancy?
- Use Phenergan during pregnancy only if absolutely necessary and under medical supervision.
- Discuss the potential risks and benefits with your doctor.
Is It Safe to Drive or Operate Machinery After Taking Phenergan?
- Because Phenergan can cause drowsiness and dizziness, avoid driving or operating machinery until you understand how the medication affects you.
What Should I Do If I Miss a Dose of Phenergan?
- If you miss a dose, take it as soon as you remember.
- If it is almost time for your next dose, skip the missed dose and resume your normal schedule.
- Do not double the dose.
Can Phenergan Cause Allergic Reactions?
- Yes, Phenergan can cause serious allergic reactions.
- Symptoms may include rashes, itching, difficulty breathing, and swelling of the face, lips, throat, or tongue.
- Seek immediate medical attention if you experience any of these symptoms.
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