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Medically reviewed by Last updated on Nov 10, 2020.


(ep i NAS teen)

Index Terms

  • Epinastine Hydrochloride
  • Epinastrine HCl

Dosage Forms

Excipient information presented when available (limited, particularly for generics); consult specific product labeling. [DSC] = Discontinued product

Solution, Ophthalmic, as hydrochloride:

Elestat: 0.05% (5 mL [DSC]) [contains benzalkonium chloride]

Generic: 0.05% (5 mL)

Brand Names: U.S.

  • Elestat [DSC]

Pharmacologic Category

  • Histamine H1 Antagonist
  • Histamine H1 Antagonist, Second Generation


Selective H1-receptor antagonist; inhibits release of histamine from the mast cell; also has affinity for the H2, alpha1, alpha2, and the 5-HT2 receptors


Low systemic absorption following topical application


Does not cross blood-brain barrier


<10% metabolized


IV: Urine (55%); feces (30%)

Onset of Action

3-5 minutes

Duration of Action

8 hours

Half-Life Elimination

12 hours

Protein Binding


Use: Labeled Indications

Treatment of allergic conjunctivitis


There are no contraindications listed in the manufacturer's labeling.

Dosing: Adult

Allergic conjunctivitis: Ophthalmic: Instill 1 drop into each eye twice daily. Continue throughout period of exposure, even in the absence of symptoms.

Dosing: Geriatric

Refer to adult dosing.

Dosing: Pediatric

Allergic conjunctivitis: Children ≥2 years and Adolescents: Ophthalmic: Instill 1 drop into each eye twice daily; continue throughout period of exposure, even in the absence of symptoms


For ophthalmic use only; avoid touching tip of applicator to eye or other surfaces. Contact lenses should be removed prior to application, may be reinserted after 10 minutes. Do not wear contact lenses if eyes are red.


Store at controlled room temperature of 15°C to 25°C (59°F to 77°F). Keep tightly closed.

Drug Interactions

There are no known significant interactions.

Adverse Reactions

The following adverse drug reactions and incidences are derived from product labeling unless otherwise specified.

Frequency not always defined.

1% to 10%:

Central nervous system: Headache (1% to 3%)

Infection: Infection (10%; defined as cold symptoms and upper respiratory tract infection)

Ophthalmic: Burning sensation of eyes, eye pruritus, follicular conjunctivitis, ocular hyperemia

Respiratory: Cough (1% to 3%), pharyngitis (1% to 3%), rhinitis (1% to 3%), sinusitis (1% to 3%)

<1%, postmarketing, and/or case reports: Increased lacrimation


Concerns related to adverse effects:

• Bacterial keratitis: Inadvertent contamination of multiple-dose ophthalmic solutions has caused bacterial keratitis.

Special populations:

• Contact lens wearers: Contains benzalkonium chloride which may be absorbed by contact lenses; remove contact lenses prior to use and wait 10 minutes before reinserting.

Other warnings/precautions:

• Appropriate use: For topical ophthalmic use only. Not for the treatment of contact lens irritation; do not wear contact lenses if eye is red.

Pregnancy Risk Factor C Pregnancy Considerations

Adverse events were observed in some animal reproduction studies.

Patient Education

What is this drug used for?

• It is used to treat eye irritation due to allergies.

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:

• Burning

• Common cold symptoms

• Watery eyes

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:

• Vision changes

• Eye pain

• Severe eye irritation

• Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.

Note: This is not a comprehensive list of all side effects. Talk to your doctor if you have questions.

Consumer Information Use and Disclaimer: This information should not be used to decide whether or not to take this medicine or any other medicine. Only the healthcare provider has the knowledge and training to decide which medicines are right for a specific patient. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a limited summary of general information about the medicine's uses from the patient education leaflet and is not intended to be comprehensive. This limited summary does NOT include all information available about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not intended to provide medical advice, diagnosis or treatment and does not replace information you receive from the healthcare provider. For a more detailed summary of information about the risks and benefits of using this medicine, please speak with your healthcare provider and review the entire patient education leaflet.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.