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Phedrax
Phedrax is a combination medication that typically contains chlorpheniramine, an antihistamine, and phenylpropanolamine, a decongestant. It is used to relieve symptoms of allergic rhinitis, common colds, and sinus congestion. Phedrax helps reduce nasal congestion, sneezing, runny nose, and itchy eyes.
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Frequently Asked Questions
How quickly does Phedrax work?
Many patients may start to feel relief within 30 minutes to an hour after taking the medication.
Can I take Phedrax with food?
Yes, Phedrax can be taken with or without food.
What should I do if I miss a dose?
If you miss a dose, take it as soon as you remember. If it's close to the time for your next dose, skip the missed dose and continue with your regular schedule. Do not double up.
Is Phedrax safe during pregnancy?
Consult your healthcare provider before using Phedrax during pregnancy to evaluate potential risks and benefits.
What are the signs of serious side effects to watch for?
Monitor for symptoms of severe allergic reactions or significant cardiovascular changes, and seek immediate medical attention if these occur.
Comprehensive Drug Guide
How Does Phedrax Work?
- Chlorpheniramine: Works by blocking histamine H1 receptors, reducing the effects of histamine in the body, which alleviates allergy symptoms such as itching, sneezing, and runny nose.
- Phenylpropanolamine: Acts as a decongestant by narrowing blood vessels in the nasal passages, which reduces swelling and congestion.
Common Dosages
- Tablets: Commonly available strengths may include 12 mg of chlorpheniramine and 75 mg of phenylpropanolamine.
Typical Dosing
- Adults and Children over 12 years: The usual dosage is 1 tablet every 4 to 6 hours as needed, not exceeding 4 tablets in 24 hours. Dosages for children under 12 should be determined by a healthcare provider.
Typical Dosing
FDA Approved Indications
- Relief of symptoms associated with allergic rhinitis, colds, and sinus congestion.
Who Shouldn't Take Phedrax?
- Known hypersensitivity to chlorpheniramine, phenylpropanolamine, or any component of the formulation
- Severe hypertension or coronary artery disease
- Glaucoma or urinary retention
Advice From The Pharmacist
- Take Phedrax exactly as directed, and do not exceed the recommended dose.
- Be cautious when driving or operating machinery, as chlorpheniramine may cause drowsiness.
- Avoid alcohol and other CNS depressants while taking this medication.
Side Effects of Phedrax
Common Side Effects
- Drowsiness or dizziness
- Dry mouth
- Nausea or gastrointestinal discomfort
Uncommon/Severe Side Effects
- Severe allergic reactions (rash, itching, swelling)
- Increased blood pressure or heart rate
Risks and Warnings of Phedrax
- Drowsiness: Monitor for sedation; avoid activities requiring alertness until you know how the medication affects you.
- Cardiovascular Effects: Use with caution in patients with pre-existing cardiovascular conditions due to the decongestant component.
Interactions with Phedrax
Common Drug Interactions
- CNS Depressants: Use with caution when combined with other medications that cause sedation or drowsiness.
- Antihypertensive Medications: Phenylpropanolamine may counteract the effects of blood pressure medications.
Alternatives to Phedrax
- Other Antihistamines: Such as loratadine or cetirizine for allergy relief.
- Other Decongestants: Such as pseudoephedrine for nasal congestion.
