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Nasop

Generic name: phenylephrine (oral)

Brand names: Sudafed PE, Sudafed PE Children's Nasal Decongestant, Sudafed PE Congestion, Nasop, Sudogest PE

Used for common cold Fever
Last updated November 3, 2026 0 views
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What is Nasop?

Nasop is used to relieve a stuffy nose, sinus congestion, and pressure caused by the common cold, hay fever, or other allergies for a short period.

Nasop may also be used for reasons not mentioned in this medication guide.

This section was rewritten for readability and reviewed for meaning.

How should I take Nasop?

Use exactly as directed on the label, or as prescribed by your doctor. Cold medicine is only for short-term use.

Follow all directions when giving Nasop to a child.

Measure liquid medicine with the supplied measuring device (not a kitchen spoon).

Your dose may change if you switch to a different brand, strength, or form of this medicine. Avoid medication errors by using exactly as directed on the label, or as prescribed by your doctor.

Do not take more than your recommended dose of this medicine.

Call your doctor if your symptoms do not improve after 7 days or if you have a fever.

Store at room temperature away from moisture and heat. Store the liquid medicine in the outer carton, protect from light.

This section was rewritten for readability and reviewed for meaning.

Warnings

Do not use Nasop if you have used an MAO inhibitor in the past 14 days, such as isocarboxazid, linezolid, methylene blue injection, phenelzine, and tranylcypromine.

This section was rewritten for readability and reviewed for meaning.

Before taking this medicine

Do not use Nasop if you have taken an MAO inhibitor in the last 14 days. A serious drug interaction could happen. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, and tranylcypromine. Wait at least 14 days after stopping an MAO inhibitor before you take this medicine.

You should not use Nasop if you are allergic to it.

Ask a doctor or pharmacist if this medicine is safe to use if you have or have ever had:

  • heart disease, high blood pressure;
  • diabetes;
  • a thyroid disorder;
  • urination problems due to an enlarged prostate; or
  • if you are on a low-salt diet.

Ask a doctor before using this medicine if you are pregnant or breastfeeding.

Do not give this medicine to a child without medical advice.

This section was rewritten for readability and reviewed for meaning.

Nasop side effects

Get emergency medical help if you notice signs of an allergic reaction: hives, trouble breathing, swelling of your face, lips, tongue, or throat.

Nasop may cause serious side effects. Stop using Nasop and call your doctor immediately if you experience:

  • dizziness;
  • nervousness; or
  • sleep problems (insomnia).

This is not a complete list of side effects, and others may happen. Contact your doctor for medical advice about side effects. You can report side effects to the FDA at 1-800-FDA-1088.

This section was rewritten for readability and reviewed for meaning.

What happens if I miss a dose?

Nasop is used as needed. If you miss a dose while on a dosing schedule, just skip it. Do not take two doses at the same time.

This section was rewritten for readability and reviewed for meaning.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Ask a doctor or pharmacist before taking other cough or cold medicines that may contain similar ingredients.

This section was rewritten for readability and reviewed for meaning.

What other drugs will affect Nasop?

Many medicines can impact how Nasop works, and some medicines should not be taken together. Inform your doctor about all the medicines you are currently taking and any new medicines you begin or stop using. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Not all potential interactions are mentioned here.

This section was rewritten for readability and reviewed for meaning.

Common questions about Nasop

Phenylephrine vs Pseudoephedrine - How do they compare?
The most important difference between phenylephrine (PE) and pseudoephedrine is that phenylephrine is ineffective at relieving nasal congestion, whereas there is some evidence that oral pseudoephedrine is effective. Continue reading
Does Mucinex help with Covid?
Mucinex does not prevent or cure COVID‑19, but it can help some people feel better by easing symptoms like chest congestion and cough. It should be used only for symptom relief and never as a substitute for COVID‑19–specific treatments, such as antivirals prescribed by your doctor. Continue reading

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Before you take this medicine: the information on this page is general and may not cover your personal circumstances. Read the label supplied with your medicine and ask a pharmacist or doctor if you are unsure, especially if you are pregnant, breastfeeding, taking other medicines or managing a long-term condition.
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Content is provided for education and is not medical advice. See our medical disclaimer.