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Generic Name: naphazoline and pheniramine ophthalmic (naf AZ oh leen and fen IR a meen off THAL mik)
Brand Name:Naphcon-A, Opcon-A, Visine-A
Medically reviewed by Holevn.org on May 27, 2019 – Written by Cerner Multum
What is Naphcon-A?
Naphazoline is a vasoconstrictor. It works by narrowing swollen blood vessels in the eyes to reduce eye redness.
Pheniramine is an antihistamine that reduces the effects of natural chemical histamine in the body. Histamine can produce symptoms of itchy or watery eyes.
Naphcon-A (for the eyes) is for temporary relief of minor eye redness or itching caused by ragweed, pollen, grass, or animal dander and hair.
Naphcon-A may also be used for purposes not listed in this medication guide.
Follow all directions on your medicine label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use.
Before taking this medicine
You should not use Naphcon-A if you are allergic to naphazoline or pheniramine.
Ask a doctor or pharmacist if it is safe for you to take this medicine if you have other medical conditions, especially:
heart disease, high blood pressure;
urination problems; or
It is not known whether Naphcon-A will harm an unborn baby. Do not use this medicine without a doctor’s advice if you are pregnant.
It is not known whether naphazoline and pheniramine ophthalmic passes into breast milk or if it could harm a nursing baby. Do not use this medicine without a doctor’s advice if you are breast-feeding a baby.
Naphcon-A should not be given to a child younger than 6 years old without a doctor’s advice.
How should I use Naphcon-A?
Use exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended.
Using the medicine too long or too often may worsen your symptoms and cause damage to blood vessels in your eyes.
Wash your hands before using the eye drops.
To apply the eye drops:
Tilt your head back slightly and pull down your lower eyelid to create a small pocket. Hold the dropper above the eye with the tip down. Look up and away from the dropper and squeeze out a drop.
Close your eye and gently press your finger to the inside corner of the eye for about 1 minute, to keep the liquid from draining into your tear duct.
Use only the number of drops recommended.
Do not touch the tip of the eye dropper or place it directly on your eye. A contaminated dropper can infect your eye, which could lead to serious vision problems.
Do not use the eye drops if the liquid has changed colors or has particles in it. Call your pharmacist for new medicine.
Stop using this medicine and call your doctor if your symptoms do not improve after 3 days of treatment.
Store at room temperature away from moisture, heat, and light. Keep the bottle tightly closed when not in use.
Throw away the eye drops after the expiration date on the medicine label has passed.
What happens if I miss a dose?
Since Naphcon-A is used when needed, you may not be on a dosing schedule. If you are on a schedule, use the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not use extra medicine to make up the missed dose.
What happens if I overdose?
An overdose of Naphcon-A is not expected to be dangerous. Seek emergency medical attention or call 115 if anyone has accidentally swallowed the medication.
Keep this medicine out of the reach of children. Certain eye medications can cause serious medical problems in a young child who accidentally sucks on or swallows medicine from the eye dropper.
What should I avoid while using naphazoline and pheniramine ophthalmic?
Do not use this medication while wearing contact lenses. Naphcon-A may contain a preservative that can discolor soft contact lenses. Wait at least 15 minutes after using Naphcon-A before putting in your contact lenses.
Naphcon-A side effects
Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Stop using this medicine and call your doctor at once if you have:
ongoing or worsening eye redness;
eye pain; or
changes in your vision.
Common side effects may include:
mild burning or stinging of the eye;
dilated pupils, blurred vision; or
eyes being more sensitive to light.
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 Naphcon-A?
Ask a doctor or pharmacist before using Naphcon-A 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.
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.
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The content of Holevn is solely for the purpose of providing information about Thuốc Naphcon-A and is not intended to be a substitute for professional medical advice, diagnosis or treatment. Please contact your nearest doctor or clinic, hospital for advice. We do not accept liability if the patient arbitrarily uses the drug without following a doctor’s prescription.
Reference from: https://www.drugs.com/mtm/naphcon-a.html