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Phenergan is a medication used to treat nausea and vomiting related to motion sickness, surgery, or a cold, as well as allergy symptoms such as a rash, itching, and a runny nose. It is also used to help patients feel sleepy and relaxed before and after surgery. Phenergan is an antihistamine that works by blocking histamine, a natural substance produced by the body during an allergic reaction. It is available in tablet and liquid form, and the dosage is based on age, medical condition, and response to treatment. It is important to note that Phenergan should not be used by children younger than 2 years old due to the risk of serious breathing problems.
| Characteristics | Values |
|---|---|
| Dosage | Adults: One to three 25mg tablets as a single dose at night, or one to two 10mg tablets, two to three times daily. Children 6-12 years: One to two 10mg tablets, or 10 to 25mL of the elixir as a single dose at night, or one 10mg tablet, or 10mL of the elixir, two to three times daily. Children 2-5 years: 5-15mL of elixir as a single dose at night, or 5mL of elixir, two to three times daily. |
| When to take | The first dose should be taken 30 to 60 minutes before beginning travel. |
| Repeat dose | After 6-8 hours if necessary. |
| Side effects | Drowsiness, dizziness, constipation, blurred vision, dry mouth, tiredness or sleepiness, involuntary muscle movements, nightmares in children, diarrhoea or constipation, eye disorders, increased sensitivity of the skin to sun, shortness of breath, difficulty passing urine, irregular heartbeat, very fast or forceful heartbeats, rapid pulse, nervousness and irritability, convulsions and/or tremors, difficulty breathing, heart palpitations, chest pain and/or rapid pulse. |
What You'll Learn
Phenergan dosage for children
Phenergan is not suitable for children under 2 years of age due to the potential for fatal respiratory depression.
Phenergan elixir is recommended for children aged 2-5 years. The dosage for this age group is 5-15ml of elixir as a single dose at night, or 5ml of elixir two to three times a day. This can be repeated after 6-8 hours if necessary.
Phenergan tablets are recommended for children over 6 years of age. The dosage for this age group is one to two 10mg tablets, or 10 to 25ml of the elixir as a single dose at night, or one 10mg tablet, or 10ml of the elixir, two to three times a day.
It is recommended that the lowest effective dose of Phenergan be used for children 2 years of age or older.
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Side effects of Phenergan
Phenergan, or Promethazine, is an antihistamine used to treat nausea and vomiting related to certain conditions, such as motion sickness, and to treat allergy symptoms. It is also used to help patients feel relaxed before and after surgery.
Phenergan has been known to cause several side effects, some more common and less serious than others.
Less Serious Side Effects
- Dry mouth, nose and throat
- Tiredness or sleepiness
- Involuntary muscle movements
- Nightmares in children
- Diarrhoea or constipation
- Blurred vision
- Congested nose
- Increased sensitivity of the skin to sun
Serious/Rare Side Effects
- Shortness of breath
- Difficulty passing urine
- Irregular heartbeat
- Very fast or forceful heartbeats (palpitations)
- Rapid pulse
- Blood and Lymphatic System Disorders
- Difficulty breathing
- Jaundice - yellow tinge to skin or eyes
- Nervous system-related issues such as tremors or convulsions
- Tinnitus - buzzing, hissing, ringing or other persistent noise in the ears
- Twitches or jerks of the muscles
- Dizziness, lightheadedness
- Muscle cramps or stiffness
- Nervousness and irritability
Very Serious Side Effects
- Wheezing or difficulty breathing
- Swelling of the face, lips, tongue or other body parts
- Severe allergic reaction where adrenaline is required for treatment (anaphylaxis)
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Phenergan interactions with other drugs
Phenergan, also known as promethazine, interacts with a wide range of drugs, including commonly used medications such as Benadryl (diphenhydramine), Cymbalta (duloxetine), Flexeril (cyclobenzaprine), Klonopin (clonazepam), Norco (acetaminophen/hydrocodone), Protonix (pantoprazole), Synthroid (levothyroxine), Topamax (topiramate), and Vitamin D3 (cholecalciferol). There are 686 known drug interactions with Phenergan, 92 of which are major, 580 moderate, and 14 minor.
Phenergan is an antihistamine that works by changing the actions of chemicals in the brain. It is important to be cautious when taking Phenergan with other medications that cause drowsiness, such as opioids, benzodiazepines, and alcohol. Phenergan may also interact with anticholinergic medications and monoamine oxidase inhibitors (MAOIs).
It is always advisable to consult a healthcare professional and provide them with a list of all the medications you are currently taking to ensure that Phenergan will not cause any adverse reactions or enhance the sedative effects of other drugs. This is particularly important for those taking medications for depression, sleep, or pain, as well as antihistamines, opioid analgesics, or medicines for irregular heartbeats.
Phenergan should not be taken with other medications that have similar properties or belong to the same chemical family, such as chlorpromazine, fluphenazine, mesoridazine, perphenazine, prochlorperazine, thioridazine, or trifluperazine. It is also important to inform your doctor if you have any medical conditions, especially those related to the kidneys, liver, heart, or blood.
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Phenergan for adults
Phenergan is an antihistamine medication that can be used to treat travel sickness in adults. It contains the active ingredient promethazine hydrochloride, which works by blocking histamine, a natural substance produced by the body during an allergic reaction.
Phenergan tablets are recommended for adults and children over 6 years of age. The recommended dosage for adults is one to three 25mg tablets as a single dose at night, or one to two 10mg tablets, two to three times daily. It is important to follow the instructions provided with the medicine and not to exceed the recommended dosage. Phenergan should not be taken for more than 7-10 days in a row, and if symptoms persist, a doctor or pharmacist should be consulted.
Phenergan may cause drowsiness, dizziness, and blurred vision in some people. It is important to be cautious and know how Phenergan affects you before driving or operating machinery. Additionally, alcohol should be avoided while taking Phenergan as it may increase the sedation effects.
Phenergan may also cause some side effects, including dry mouth, tiredness, sleepiness, blurred vision, and increased sensitivity to sunlight. If any side effects occur, it is recommended to speak to a doctor or pharmacist.
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Phenergan alternatives
Phenergan is an antihistamine medicine that can be used to treat travel sickness. It is available over the counter without a prescription and comes in tablet and liquid form. It is recommended that Phenergan is taken the night before travel and repeated after 6 to 8 hours if necessary.
Phenergan is not suitable for everyone, and alternatives are available. Here are some alternative treatments for travel sickness:
- Avomine: This is another brand name for promethazine, the active ingredient in Phenergan. It can be purchased over the counter and is available as tablets or capsules.
- Sominex: This is also an alternative brand of promethazine.
- Transderm-Scop: Transderm-Scop is an alternative to Phenergan, although it may cause more side effects.
- Dramamine: This is an alternative medication for motion sickness, although it may cause drowsiness.
- Boots' chewable travel sickness pills: These are recommended for use in the USA.
- Non-drowsy antihistamines: These include cetirizine, fexofenadine, and loratadine. These are less likely to interfere with your daily routine but may be less effective in treating travel sickness.
- Herbal remedies and supplements: Some people may prefer to take herbal remedies or supplements to help with travel sickness. However, caution is advised as these may have side effects such as sleepiness. Always ask a pharmacist for advice before taking any herbal or supplement products.
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Frequently asked questions
For motion sickness, the first dose of Phenergan should be taken 30 to 60 minutes before beginning travel. It is recommended to be taken the night before travel and can be repeated after 6 to 8 hours if required.
The dosage is based on your age, medical condition, and response to treatment. It is recommended that the lowest effective dose of Phenergan be used, especially for children.
Phenergan may cause drowsiness, dizziness, constipation, blurred vision, or dry mouth. It is also known to cause excitement in young children instead of drowsiness.
Phenergan may interact with other medications, especially those that cause drowsiness or breathing problems. It is important to consult your doctor or pharmacist before taking Phenergan with other medications.
Phenergan should not be used by children under 2 years of age as it may cause serious respiratory depression. For children 2 years and older, the lowest effective dosage should be used, and other drugs that affect breathing should be avoided.
