Possible Side Effects of Neo-Synephrine Some of the reported bothersome (but not usually dangerous) side effects of decongestant nasal sprays like Neo-Synephrine include:
- Nasal dryness
- Sneezing
- Temporary burning or stinging
- Worsening of congestion with prolonged use of the spray (see Neo-Synephrine Addiction) .
- burning,
- stinging,
- pain,
- increased redness of the eye,
- tearing or blurred vision,
- headache,
- tremor,
- nausea,
Are there any side effects of Neo-Synephrine?
Along with its needed effects, phenylephrine (the active ingredient contained in Neo-Synephrine) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. Check with your doctor or nurse immediately if any of the following side effects occur while taking phenylephrine:
What is prescription-strength Neo-Synephrine?
Prescription-strength Neo-Synephrine is used to constrict blood vessels in the eye and to dilate (make bigger) the pupil for conditions such as glaucoma, before surgery, and before eye examinations. Neo-Synephrine is available in generic form. Common side effects of Neo-Synephrine include burning, stinging, pain,...
What are the possible side effects of synephrine?
Along with its needed effects, phenylephrine (the active ingredient contained in Neo-Synephrine) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. ... Bradycardia, AV block, ventricular extrasystoles, myocardial ischemia, hypertensive crisis . Nervous system.
Does Neo-Synephrine interact with other medications?
Neo-Synephrine. Neo-Synephrine may interact with monoamine oxidase inhibitors (MAOIs) or beta-blockers. Talk to your doctor before taking any prescription or over-the-counter medicines, including vitamins, minerals, and herbal products. It is not known whether Neo-Synephrine will be harmful to a fetus.

What is an expected side effect when taking Neo-Synephrine?
Common side effects of Neo-Synephrine Nasal may include: mild burning, dryness, cold feeling, or irritation inside your nose; headache, dizziness, weakness; feeling excited or restless (especially in children); or. mild sleep problems.
Is it safe to use Neo-Synephrine?
Temporary burning, stinging, dryness in the nose, runny nose, and sneezing may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. If your doctor has prescribed this medication, remember that your doctor has judged that the benefit to you is greater than the risk of side effects.
How long can you use Neo-Synephrine?
Also, do not use this medication for more than 3 days because doing so may cause a condition called rebound congestion. Symptoms of rebound congestion include long-term redness and swelling inside the nose and increased runny nose. If this occurs, stop using this medication and consult your doctor or pharmacist.
How long does Neo-Synephrine take to work?
NEO-SYNEPHRINE hydrochloride produces vasoconstriction that lasts longer than that of epinephrine and ephedrine. Responses are more sustained than those to epinephrine, lasting 20 minutes after intravenous and as long as 50 minutes after subcutaneous injection.
What does phenylephrine do to the heart?
Phenylephrine is an α-receptor agonist without β-agonist activity. Its administration causes vasoconstriction and an increase in arterial blood pressure, and a decrease in heart rate. Cardiac output may decrease13,27,28 or increase.
Is Neo synephrine addictive?
THERE IS ONE TYPE OF NASAL SPRAY THAT IS “ADDICTIVE” These are nasal decongestant sprays such as OXYMETAZOLINE (AFRIN®, SINEX, SUDAFED NASAL SPRAY) or NEOSYNEPHRINE!
What drug class is neo synephrine?
It belongs to a class of drugs known as decongestants. Phenylephrine works by narrowing blood vessels.
Do they still make neo synephrine?
Medically reviewed by Drugs.com on May 13, 2022. Written by Cerner Multum. The Neo-Synephrine 12 Hour brand name has been discontinued in the U.S. If generic versions of this product have been approved by the FDA, there may be generic equivalents available.
Who should not take phenylephrine?
Do not use phenylephrine 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.
Does NEO-SYNEPHRINE raise blood pressure?
It is a vasoconstrictor medication, structurally similar to epinephrine and ephedrine. Vasoconstriction increases blood pressure. Phenylephrine increases blood pressure and heart rate without affecting heart rhythm.
Can NEO-SYNEPHRINE cause bradycardia?
Results: Phenylephrine is a pure vasopressor that only has activity at the alpha-adrenergic receptors. Because it does not have any beta agonist properties to support cardiac output, activation of the baroreceptor may result in bradycardia.
What is the active ingredient in NEO-SYNEPHRINE?
Active Ingredient: Phenylephrine hydrochloride 0.50%.
What happens if you take too much phenylephrine?
Symptoms of overdose may include: severe dizziness/fainting, hallucinations, fast/irregular heartbeat, slow/shallow breathing, vomiting, seizures. If this product has been prescribed, do not share this medication with others.
What is neo synephrine IV used for?
Phenylephrine is a man-made drug that stimulates receptors (alpha1 receptors) on blood vessels and cause blood vessels to constrict (vasoconstriction). It is a vasoconstrictor medication, structurally similar to epinephrine and ephedrine. Vasoconstriction increases blood pressure.
What are the side effects of taking too much meds?
Note: The above side effects are more likely to occur in children because there is a greater chance that too much of this medicine may be absorbed into the body. Fast, irregular, or pounding heartbeat. headache or dizziness. increased sweating.
Does phenylephrine cause side effects?
Although not all of these side effects may occur , if they do occur they may need medical attention .
Does phenylephrine nasal go away?
These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.
What are some other side effects of Neo-Synephrine?
All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:
How to use Neo-Synephrine?
Use Neo-Synephrine (phenylephrine injection) as ordered by your doctor. Read all information given to you. Follow all instructions closely. This medicine is given as a shot into a vein or into a vein nonstop for a period of time.
What are some side effects that I need to call my doctor about right away?
WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:
What are some things I need to know or do while I take Neo-Synephrine?
Tell all of your health care providers that you take Neo-Synephrine (phenylephrine injection). This includes your doctors, nurses, pharmacists, and dentists.
How do I store and/or throw out Neo-Synephrine?
If you need to store Neo-Synephrine (phenylephrine injection) at home, talk with your doctor, nurse, or pharmacist about how to store it.
What to do if you have questions about neo-synephrine?
If you have any questions about Neo-Synephrine (phenylephrine injection), please talk with your doctor, nurse, pharmacist, or other health care provider.
Can you take phenylephrine with prescription?
Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take Neo-Synephrine ( phenylephrine injection) with all of your drugs and health problems.
For the Consumer
Along with its needed effects, oxymetazoline nasal (the active ingredient contained in Neo-Synephrine 12 Hour) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
For Healthcare Professionals
Very rare (less than 0.01%): Tachycardia, palpitations, increased blood pressure [ Ref]
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
What is neo synephrine used for?
Neo- Synephrine (phenylephrine hydrochloride ophthalmic solution) is a vasoconstrictor (constricts the veins) and mydriatic (dilates the pupils), and the over-the-counter strength is used to relieve redness, burning, irritation, and dryness of the eye caused by wind, sun, and other minor irritants. Prescription-strength Neo-Synephrine is used to constrict blood vessels in the eye and to dilate (make bigger) the pupil for conditions such as glaucoma, before surgery, and before eye examinations. Neo-Synephrine is available in generic form. Common side effects of Neo-Synephrine include burning, stinging, pain, increased redness of the eye, tearing or blurred vision, headache, tremor, nausea, sweating, nervousness, dizziness, drowsiness, dryness in the nose, runny nose, and sneezing .
What is the purpose of neosynephrine?
Prescription-strength Neo-Synephrine is used to constrict blood vessels in the eye and to dilate (make bigger) the pupil for conditions such as glaucoma, before surgery, and before eye examinations. Neo-Synephrine is available in generic form.
Can phenylephrine be absorbed into the bloodstream?
Although the risk of serious side effects is low when phenylephrine ophthalmic is used in the eyes, side effects can occur if the medicine is absorbed into your bloodstream. Stop using phenylephrine ophthalmic and call your doctor at once if you have:
Does neo synephrine interact with MAOIs?
The dose of Neo-Synephrine depends on the condition being treated. Neo-Synephrine may interact with monoamine oxidase inhibitors (MAOIs) or beta-blockers. Talk to your doctor before taking any prescription or over-the-counter medicines, including vitamins, minerals, and herbal products. It is not known whether Neo-Synephrine will be harmful ...
Is neosynephrine harmful to fetus?
It is not known whether Neo-Synephrine will be harmful to a fetus. Talk to your doctor if you are pregnant or could become pregnant during treatment. It is not known whether this medication passes into breast milk. Consult your doctor before breastfeeding. Our Neo-Synephrine (phenylephrine hydrochloride ophthalmic solution) Side Effects Drug Center ...
Does neo synephrine cause headaches?
Common side effects of Neo-Synephrine include burning, stinging, pain, increased redness of the eye, tearing or blurred vision, headache, tremor, nausea, sweating, nervousness, dizziness, drowsiness, dryness in the nose, runny nose, and sneezing . The dose of Neo-Synephrine depends on the condition being treated.
Does phenylephrine cause side effects?
Along with its needed effects, phenylephrine ophthalmic (the active ingredient contained in Neo-Synephrine Ophthalmic) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Does phenylephrine ophthalmic go away?
Some side effects of phenylephrine ophthalmic may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.
What is Neo-Synephrine Nasal?
Phenylephrine is a decongestant that shrinks blood vessels in the nasal passages. Dilated blood vessels can cause nasal congestion (stuffy nose).
What are the side effects of a sneeze?
severe stinging, burning, or irritation inside your nose; severe dizziness, restless feeling, nervousness, or insomnia; mood changes, unusual thoughts or behavior; tremors or shaking; or. little or no urination. Side effects may be more likely in older adults. Common side effects may include: temporary sneezing;
How to use nasal drops?
To use the nasal drops, lie on your back with your head tilted back. Insert the correct number of drops and remain lying in this position for several minutes. Gently turn your head from side to side.
Can you get neosynephrine nasal in your eyes?
Avoid getting Neo-Synephrine Nasal in your eyes.
Can you take Neo-Synephrine Nasal while pregnant?
It is not known whether Neo-Synephrine Nasal will harm an unborn baby. Do not use this medicine without a doctor's advice if you are pregnant.
Can you use Neo-Synephrine Nasal with MAO inhibitor?
Do not use Neo-Synephrine Nasal if you have used an MAO inhibitor in the past 14 days, such as isocarboxazid, linezolid, methylene blue injection, phenelzine, rasagiline, selegiline, or tranylcypromine.
Can you take neosynephrine with other drugs?
Ask a doctor or pharmacist before using Neo-Synephrine Nasal if you are also using any other drugs, including prescription and over-the-counter medicines, vitamins, and herbal products. Some medicines can cause unwanted or dangerous effects when used together. Not all possible interactions are listed in this medication guide.
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If experienced, these tend to have a Less Severe expression i
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If experienced, these tend to have a Severe expression i
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If experienced, these tend to have a Severe expression i
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If experienced, these tend to have a Less Severe expression i
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If experienced, these tend to have a Less Severe expression i
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