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Naphcon Forte

Generic name: naphazoline hydrochloride
Dosage form: ophthalmic solution
Drug class: Ophthalmic antihistamines and decongestants

Medically reviewed by Last updated on Mar 22, 2021.


NAPHCON® FORTE (Naphazoline Hydrochloride Ophthalmic Solution USP), 0.1% is a sterile preparation. Naphazoline HCl, an ocular vasoconstrictor, is an imidazoline derivative sympathomimetic amine. It occurs as a white, odorless crystalline powder having a bitter taste and is freely soluble in water and in alcohol. The active ingredient is represented by the structural formula:



Chemical name:

2-(1-naphthylmethyl)-2-imidazoline monohydrochloride

Each mL contains: Active: Naphazoline Hydrochloride 0.1%. Preservative: Benzalkonium Chloride 0.01%. Inactives: Boric Acid, Sodium Chloride, Potassium Chloride, Edetate Disodium, Sodium Carbonate and/or Hydrochloric Acid (to adjust pH), Purified Water. DM-00

The solution has a pH of 5.5 to 7.0.


Naphazoline constricts the vascular system of the conjunctiva. It is presumed that this effect is due to direct stimulation action of the drug upon the alpha adrenergic receptors in the arterioles of the conjunctiva resulting in decreased conjunctival congestion. Naphazoline belongs to the imidazoline class of sympathomimetics.


NAPHCON® FORTE (Naphazoline Hydrochloride Ophthalmic Solution USP), 0.1% is indicated for use as a topical ocular vasoconstrictor.


Contraindicated in the presence of an anatomically narrow angle or in narrow angle glaucoma or in persons who have shown hypersensitivity to any component of this preparation.


NOT FOR INJECTION – FOR OPHTHALMIC USE ONLY. Patients under therapy with MAO inhibitors may experience a severe hypertensive crisis if given a sympathomimetic drug. Use in children, especially infants, may result in CNS depression leading to coma and marked reduction in body temperature.

Remove contact lenses before using.



For topical ophthalmic use only. Use with caution in the presence of hypertension, cardiovascular abnormalities, hyperglycemia (diabetes), hyperthyroidism, infection or injury.

Information for Patients

Patients should be advised to discontinue the drug and consult a physician if relief is not obtained within 48 hours of therapy, if irritation, blurring or redness persists or increases, or if symptoms of systemic absorption occur, i.e., dizziness, headache, nausea, decrease in body temperature, or drowsiness.

To prevent contaminating the dropper tip and solution, do not touch the eyelids or the surrounding area with the dropper tip of the bottle. If solution changes color or becomes cloudy, do not use.

Drug Interactions

Concurrent use of maprotiline or tricyclic antidepressants and naphazoline may potentiate the pressor effect of naphazoline. Patients under therapy with MAO inhibitors may experience a severe hypertensive crisis if given a sympathomimetic drug. (See WARNINGS.)

Pregnancy Category C

Animal reproduction studies have not been conducted with naphazoline. It is also not known whether naphazoline can cause fetal harm when administered to a pregnant woman or can affect reproduction capacity. Naphazoline should be given to a pregnant woman only if clearly needed.

Nursing Mothers

It is not known whether naphazoline is excreted in human milk. Because many drugs are excreted in human milk, caution should be exercised when naphazoline is administered to a nursing woman.

Pediatric Use

Safety and effectiveness in pediatric patients have not been established. See “WARNINGS” and “CONTRAINDICATIONS.”


Ocular: Mydriasis, increased redness, irritation, discomfort, blurring, punctuate keratitis, lacrimation, increased intraocular pressure.

Systemic: Dizziness, headache, nausea, sweating, nervousness, drowsiness, weakness, hypertension, cardiac irregularities, and hyperglycemia.


Instill one or two drops in the conjunctival sac(s) every three to four hours as needed.


NAPHCON® FORTE (Naphazoline Hydrochloride Ophthalmic Solution USP), 0.1% is available in 15 mL in DROP-TAINER® dispenser.

NDC 0998-0079-15.

Storage: Store at 8° - 27°C (46° - 80°F).

Caution: Federal ( USA) law prohibits dispensing without prescription.

ALCON ( Puerto Rico) INC.
Humacao, Puerto Rico 00791 USA

Printed in USA

September 1996


naphazoline hydrochloride solution
Product Information
Product Type HUMAN PRESCRIPTION DRUG LABEL Item Code (Source) NDC:0998-0079
Route of Administration OPHTHALMIC DEA Schedule
Active Ingredient/Active Moiety
Ingredient Name Basis of Strength Strength
naphazoline hydrochloride (naphazoline) naphazoline 1 mg in 1 mL
Inactive Ingredients
Ingredient Name Strength
benzalkonium chloride
boric acid
sodium chloride
potassium chloride
edetate disodium
sodium carbonate and/or hydrochloric acid
# Item Code Package Description
1 NDC:0998-0079-15 15 mL (15 MILLILITER) in 1 BOTTLE, PLASTIC
Labeler - Alcon

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