Phenylephrine
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Drug Status
Government Approvals
US(FDA)
WHO Essential Medicine
NO
Known Teratogen
NO
Pharmaceutical Class
Alpha-1 Adrenergic Agonist
Controlled Drug Substance
YES
Phenylephrine
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Click HereSummary
Phenylephrine is used to relieve nasal discomfort from colds, allergies, hay fever, and sinus congestion and pressure.
Phenylephrine works by constricting blood vessels in the nasal passages. This reduces swelling and congestion, making it easier to breathe by relieving nasal discomfort and pressure.
For adults and children 12 years and older, the usual dose is 10 mg every 4 hours as needed, not exceeding 60 mg in 24 hours. For children under 12, consult a doctor for the appropriate dose.
Common side effects of Phenylephrine include nervousness, dizziness, and sleeplessness. If you experience any of these, stop using the medication and consult your doctor.
Do not use Phenylephrine if you are taking MAO inhibitors or have stopped taking them within the last 2 weeks. Consult a doctor if you have heart disease, high blood pressure, thyroid disease, diabetes, or trouble urinating due to an enlarged prostate. If you experience nervousness, dizziness, or sleeplessness, stop use and consult a doctor.
Indications and Purpose
How does one know if Phenylephrine is working?
The benefit of Phenylephrine is evaluated by its ability to relieve nasal congestion and sinus pressure. If symptoms do not improve within 7 days or are accompanied by fever, the medication should be discontinued, and a doctor should be consulted.
How does Phenylephrine work?
Phenylephrine works by constricting blood vessels in the nasal passages, which reduces swelling and congestion. This action helps to relieve nasal discomfort and pressure, making it easier to breathe.
Is Phenylephrine effective?
Phenylephrine is a nasal decongestant that works by reducing swelling in the nasal passages, providing relief from nasal discomfort due to colds, allergies, and sinus congestion. Its effectiveness is supported by its widespread use and inclusion in many over-the-counter cold and allergy medications.
What is Phenylephrine?
Phenylephrine is a nasal decongestant used to relieve nasal discomfort from colds, allergies, and sinus congestion. It works by reducing swelling in the nasal passages, allowing for easier breathing. While it alleviates symptoms, it does not treat the underlying cause of congestion.
What is Phenylephrine used for?
Phenylephrine is indicated for relieving nasal discomfort caused by colds, allergies, hay fever, and sinus congestion and pressure. It helps alleviate symptoms but does not treat the underlying cause of these conditions.
Directions for Use
For how long do I take Phenylephrine?
Phenylephrine is typically used as needed for symptom relief. If symptoms persist beyond 7 days, or if you develop a fever, stop using it and consult a doctor.
How do I take Phenylephrine?
Phenylephrine can be taken with or without food. Follow the directions on the package or your doctor's instructions carefully. There are no specific food restrictions while taking this medication.
How long does it take for Phenylephrine to start working?
Phenylephrine typically starts working within 15 to 30 minutes after taking it, providing relief from nasal congestion and sinus pressure.
How should I store Phenylephrine?
Store Phenylephrine in its original container, tightly closed, at room temperature away from excess heat and moisture. Keep it out of reach of children and do not store it in the bathroom.
What is the usual dose of Phenylephrine?
For adults and children 12 years and older, the usual dose is 10 mg every 4 hours as needed, not exceeding 60 mg in 24 hours. For children under 12, consult a doctor for appropriate dosing.
Warnings and Precautions
Can I take Phenylephrine with other prescription drugs?
Phenylephrine should not be used with monoamine oxidase inhibitors (MAOIs) or within 2 weeks of stopping them, as this can lead to dangerous interactions. Always inform your doctor about all medications you are taking to avoid potential interactions.
Can Phenylephrine be taken safely while breastfeeding?
If you are breastfeeding, consult your doctor before using Phenylephrine to ensure it is safe for you and your baby.
Can Phenylephrine be taken safely while pregnant?
If you are pregnant or planning to become pregnant, consult your doctor before using Phenylephrine. There is no strong evidence from human studies on fetal harm, but it is always best to seek medical advice.
Who should avoid taking Phenylephrine?
Do not use Phenylephrine if you are taking MAO inhibitors or have stopped taking them within the last 2 weeks. Consult a doctor if you have heart disease, high blood pressure, thyroid disease, diabetes, or trouble urinating due to an enlarged prostate. Stop use and consult a doctor if you experience nervousness, dizziness, or sleeplessness.
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