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Phenergan, also known by its generic name promethazine, is a medication that can be used to treat allergic reactions, nausea, vomiting, motion sickness, and pain before or after procedures. It is also used to prevent motion sickness and treat surgery-related nausea. While Phenergan can be beneficial, it is not without its side effects. One of the adverse effects that has been reported is muscle twitching or uncontrolled movements of the face and body, which can be early warning signs of dangerous side effects. Due to these potential risks, it is crucial to consult a doctor immediately if one experiences muscle twitching or other uncontrolled movements while taking Phenergan.
| Characteristics | Values |
|---|---|
| Brand Name | Phenergan |
| Active Ingredient | Promethazine |
| Drug Class | Antihistamine |
| Dosage | Varies depending on the condition being treated |
| Side Effects | Muscle twitching, uncontrolled muscle movements, drowsiness, dizziness, dry mouth, blurred vision, increased blood sugar, seizures, fever, fast or uneven heartbeat, confusion, stiffness, tremors, loss of balance or coordination, restlessness, shuffling walk, involuntary movement problems, etc. |
| Contraindications | Children under 2 years old, seizures disorders, serious heart problems, asthma, bronchitis, recent use of MAOIs |
| Interactions | Cold or allergy medicine, sedatives, narcotic pain medicine, sleeping pills, muscle relaxers, medicine for seizures, depression, or anxiety, atropine, belladonna, blood pressure medication, bladder or urinary medications, MAO inhibitors, etc. |
| Warnings | May cause severe breathing problems or death in very young children, may impair thinking or reactions, avoid alcohol and other CNS depressants, may affect results of certain tests including pregnancy tests and blood sugar tests, may cause severe sunburns and increase skin sensitivity to sunlight, may cause severe tissue damage if injected |
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Phenergan side effects
Phenergan, also known as promethazine, is an antihistamine medication that can treat allergic reactions and their symptoms. It can also help relieve nausea, vomiting, pain, and motion sickness. However, it is associated with several side effects, and it is important to be aware of these before taking the medication.
Phenergan can cause uncontrolled and repetitive body movements, muscle stiffness or spasms, tremors, shaking, loss of balance or coordination, and restlessness. These may be signs of extrapyramidal symptoms (EPS). If you experience any unusual or uncontrolled movements, especially in the face, such as chewing, lip-smacking, frowning, blinking, or eye movement, you should stop taking Phenergan and seek medical advice immediately.
Other side effects may include dizziness, drowsiness, and impaired thinking or reactions. As a result, you should be cautious when performing activities that require alertness, such as driving, and avoid alcohol consumption, as it can enhance these side effects. Phenergan may also increase your sensitivity to sunlight, leading to severe sunburns, blisters, and swelling. It is recommended to stay out of direct sunlight, and if exposure is necessary, take protective measures such as wearing sunscreen and covering your skin.
In addition, Phenergan may cause dry eyes, blurred vision, and dry mouth. For dry eyes, lubricating eye drops may help, while sugarless candy, gum, or a saliva substitute can provide temporary relief for dry mouth. If these symptoms persist or become severe, consult your healthcare provider.
Phenergan can also cause more serious side effects, such as neuroleptic malignant syndrome (NMS), which includes symptoms like muscle stiffness, fever, fast breathing, seizures, increased sweating, and loss of bladder control. If you experience any of these symptoms, stop taking the medication and seek immediate medical attention.
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Phenergan and interactions with other medicines
Phenergan (promethazine) is an antihistamine medication that prevents and treats the symptoms of an allergic reaction. It can also help relieve nausea, vomiting, or pain before or after procedures. It is known to interact with 690 medications.
Phenergan can cause side effects that may impair your thinking or reactions. It is advised to be careful if you plan to drive or do anything that requires you to be awake and alert. It is recommended to avoid drinking alcohol, as it can increase some of the side effects of Phenergan.
Some of the medicines that can interact with Phenergan are:
- Cold or allergy medicine
- Sedatives
- Narcotic pain medicine
- Sleeping pills
- Muscle relaxers
- Medicine for seizures, depression, or anxiety
- Atropine (Atreza, Sal-Tropine)
- Belladonna (Donnatal, and others)
- Benztropine (Cogentin)
- Dimenhydrinate (Dramamine)
- Methscopolamine (Pamine)
- Scopolamine (Transderm-Scop)
- Guanadrel (Hylorel)
- Guanethidine (Ismelin)
- Propranolol (Inderal)
- Oxybutynin (Ditropan, Oxytrol)
- Solifenacin (Vesicare)
- MAO inhibitors such as isocarboxazid (Marplan), tranylcypromine (Parnate), phenelzine (Nardil), or selegiline (Eldepryl, Emsam)
- Methylene blue injection
Additionally, Phenergan should not be given to children younger than 2 years old, as it can cause severe breathing problems or even death. It is also not recommended for individuals with asthma or other lower respiratory tract disorders.
Before taking Phenergan, it is important to consult a doctor and disclose all prescription and over-the-counter medications, vitamins, minerals, herbal products, and drugs prescribed by other doctors.
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Phenergan and photosensitivity
Phenergan (Promethazine) is a medicine used to help with allergy symptoms, reduce or prevent nausea and vomiting in certain situations, or provide sedative or pain-relieving effects after surgery. It works by blocking certain histamine receptors in the body, which helps to reduce itching, sneezing, and other allergy symptoms. It also affects parts of the brain that control nausea and vomiting.
Promethazine may also be used for other conditions as determined by a healthcare provider. It is available as tablets and liquid taken by mouth and as a rectal suppository. It can also be given as an injection by a healthcare provider.
Promethazine can make your skin more sensitive to light from the sun, sunlamps, and tanning beds. This is called photosensitivity. Exposure to this light can cause severe sunburns, blisters, and swelling. If you need to be in sunlight, wear sunscreen, a hat, and clothing that covers your skin. People aged 65 and older can be at greater risk for some side effects from promethazine. Talk to your healthcare provider about your risks.
Photosensitivity reactions induced by drugs may be phototoxic or photoallergic in nature. Acute phototoxic reactions are the more common of the two and are generally characterised by erythema.
There have been several studies and reports on photosensitivity caused by promethazine. In 1960, a report was published in the British Medical Journal titled "Photosensitivity caused by promethazine" by NEWILL RG. In 1955, Sidi, E. et al. published a paper titled "Allergic sensitization and photosensitization to Phenergan cream" in the Journal of Investigative Dermatology. In 1957, Epstein, S. and Rowe, R.J. published a paper titled "Photoallergy and photocross-sensitivity to Phenergan" in the Journal of Investigative Dermatology. In 1968, Adler A. published a paper titled "Solar Dermatitis in Adults" in the Proceedings of the Royal Society of Medicine, which included a section on promethazine-induced dermatitis.
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Phenergan and diabetes
Phenergan, also known as promethazine, is an antihistamine medication that prevents and treats the symptoms of an allergic reaction. It can also help relieve nausea, vomiting, or pain before or after procedures. It can also prevent and treat motion sickness. It is also used as a sedative or sleep aid.
Phenergan may interfere with blood glucose control and reduce the effectiveness of metformin and other diabetic medications. It may also increase blood sugar levels, with the risk being higher in patients who already have diabetes. Therefore, it is important to monitor your blood sugar levels closely and inform your doctor about all other medications you use, including vitamins and herbs.
Alcohol may also affect blood glucose levels in patients with diabetes. Both hypoglycemia (low blood sugar) and hyperglycemia (high blood sugar) may occur, depending on the amount and frequency of alcohol consumption. Therefore, it is recommended to avoid alcohol consumption on an empty stomach or following exercise, as it may increase the risk of hypoglycemia.
Additionally, Phenergan may decrease your ability to sweat, making you more susceptible to heat stroke. It is advised to avoid activities that may cause overheating, such as strenuous work or exercise in hot weather, and to seek medical help if you develop a fever, mental/mood changes, headache, or dizziness.
Phenergan is not recommended for children younger than two years old, as it may cause serious breathing problems or even death in very young children. For children aged two years and older, the lowest effective dosage should be used, and other drugs that affect breathing should be avoided.
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Phenergan and bone marrow suppression
Phenergan, also known by its generic name promethazine, is an antihistamine medication that prevents and treats the symptoms of an allergic reaction. It can also help with nausea, vomiting, pain, and motion sickness. It is available as an oral tablet, oral syrup, rectal suppository, or injection into a muscle.
Phenergan can cause bone marrow suppression, which means that the bone marrow does not make enough blood cells. This can lead to a deficiency of important cells such as red blood cells, white blood cells, platelets, and neutrophils. Symptoms of bone marrow suppression include infections or bleeding, which can become life-threatening. It is important to keep all appointments for blood tests and to inform your healthcare provider if you experience any symptoms of bone marrow suppression.
Bone marrow suppression is a serious condition that requires immediate medical attention. It can be caused by anti-cancer chemotherapy, and in such cases, it is often challenging to treat and may necessitate hospitalisation. The treatment involves strict infection control and the aggressive use of intravenous antibiotics at the first sign of infection.
Phenergan has various other side effects, including uncontrolled and repetitive body movements, muscle stiffness or spasms, tremors, restlessness, drowsiness, dizziness, and dry mouth. Some of these side effects may be more common or severe in older adults. It is important to carefully follow the doctor's instructions when taking Phenergan and to be cautious when performing activities that require alertness, such as driving. Alcohol consumption should be avoided as it can increase the side effects of Phenergan.
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Frequently asked questions
Phenergan is a brand name for the medication promethazine hydrochloride. It is an antihistamine medication that prevents and treats the symptoms of an allergic reaction. It can also help relieve nausea, vomiting, pain, motion sickness, and help you relax and sleep.
Phenergan can cause involuntary muscle movements, including twitching, jerking, spasms, tremors, and uncontrolled movements of the face, arms, and legs. If you experience any unusual or uncontrolled movements, contact your healthcare provider immediately.
Phenergan may cause dry eyes, blurred vision, increased sensitivity to sunlight, dizziness, drowsiness, confusion, and impaired thinking or reactions. It can also cause severe side effects, including seizures, breathing problems, allergic reactions, and liver problems. It is important to carefully follow the instructions provided by your doctor when taking Phenergan and to report any unusual symptoms.
