What is Nasop?
Nasop may also be used for purposes not listed in this medication guide.
Before taking this medicine
Do not use Nasop if you have used an MAO inhibitor in the past 14 days. A dangerous drug interaction could occur. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, rasagiline, selegiline, tranylcypromine, and others.
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:
heart disease, high blood pressure;
a thyroid disorder;
an enlarged prostate and urination problems; or
any drug allergies.
Ask a doctor before using this medicine if you are pregnant or breast-feeding.
The liquid form of this medicine may contain phenylalanine. Check the medication label if you have phenylketonuria (PKU).
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 until your symptoms clear up.
Always follow directions on the medicine label about giving cold medicine to a child.
You must chew the chewable tablet before you swallow it.
Measure liquid medicine carefully. Use the dosing syringe provided, or use a medicine dose-measuring device (not a kitchen spoon).
Remove an orally disintegrating tablet from the package only when you are ready to take the medicine. Place the tablet in your mouth and allow it to dissolve, without chewing. Swallow several times as the tablet dissolves.
Call your doctor if your symptoms do not improve after 7 days, or if you have a fever, rash, or headaches.
If you need surgery, tell your surgeon if you are currently using Nasop.
Store at room temperature away from moisture and heat. Do not freeze.
What happens if I miss a dose?
Since cold medicine is used when needed, you may not be on a dosing schedule. Skip any missed dose if it's almost time for your next dose. Do not use two doses at one time.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
What should I avoid while taking Nasop?
Ask a doctor or pharmacist before using other cough or cold medicines that may contain similar ingredients.
Nasop side effects
Get emergency medical help if you have signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Stop using Nasop and call your doctor at once if you have:
fast, pounding, or irregular heartbeat;
severe dizziness or nervousness;
sleep problems (insomnia); or
increased blood pressure--severe headache, blurred vision, pounding in your neck or ears.
Common side effects may include:
flushing (warmth, redness, or tingly feeling);
loss of appetite; or
feeling restless or excited (especially in children).
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
What other drugs will affect Nasop?
Many drugs can affect Nasop, and some drugs should not be used at the same time. Tell your doctor about all your current medicines and any medicine you start or stop using. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed here.
Frequently asked questions
More about Nasop (phenylephrine)
- Side Effects
- During Pregnancy or Breastfeeding
- Dosage Information
- Imprints, Shape & Color Data
- Drug Interactions
- En Español
- Drug class: decongestants
- Latest FDA Alerts (2)
Related treatment guides
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
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