Alrex contains the active ingredient loteprednol etabonate. It is a prescription corticosteroid eye drop used for the temporary, short-term relief of seasonal allergic conjunctivitis.
Alrex is an ophthalmic suspension, which means the medication particles are mixed throughout a liquid. The bottle normally needs to be shaken well before each use so the correct amount of medicine is delivered.
Seasonal Allergic Conjunctivitis
Seasonal allergic conjunctivitis is an allergic reaction that affects the thin tissue covering the white part of the eye and the inside of the eyelids.
It commonly occurs during times of the year when pollen levels are high. Other possible triggers include mold spores, grass, weeds, trees, dust, and pet dander.
Symptoms may affect one or both eyes.
Common Eye Allergy Symptoms
Seasonal allergic conjunctivitis may cause:
- Intense itching
- Red or bloodshot eyes
- Watery eyes
- Swollen eyelids
- Burning or stinging
- A gritty feeling in the eyes
- Increased sensitivity to light
- Mild blurred vision caused by tearing or swelling
Eye allergies do not usually cause thick yellow or green discharge. This type of discharge may suggest an infection and should be assessed by a healthcare provider.
How Alrex Works
Alrex belongs to a class of medications called corticosteroids.
An allergic reaction begins when the immune system responds to a normally harmless substance, such as pollen. The body releases inflammatory chemicals that cause itching, redness, swelling, and watering.
Loteprednol reduces the production and activity of these inflammatory substances. This helps calm the allergic response inside the eye.
Reduction of Inflammation
Alrex may help reduce:
- Eye redness
- Eyelid swelling
- Itching
- Burning
- Irritation
- Excessive watering
The medication controls inflammation but does not remove the allergen causing the reaction.
Avoiding known allergy triggers may help improve treatment results.
Short-Term Symptom Relief
Alrex is intended to provide temporary relief from seasonal eye allergy symptoms. It is not usually intended for continuous, long-term use without regular eye examinations.
A healthcare provider will decide how long treatment should continue based on:
- The severity of the symptoms
- How well the eyes respond
- The presence of other eye conditions
- The risk of corticosteroid-related side effects
Do not continue using Alrex longer than prescribed.
Difference From Antihistamine Eye Drops
Antihistamine eye drops mainly block histamine, one of the substances involved in an allergic reaction.
Alrex has a broader anti-inflammatory effect. It may be prescribed when inflammation is more noticeable or when other allergy treatments do not provide enough relief.
Because it is a corticosteroid, Alrex requires closer medical supervision than many non-steroid allergy eye drops.
Gradual Improvement
Some symptoms may begin to improve after treatment starts, but the response varies.
Continue using Alrex according to the prescribed schedule. Do not apply extra drops to obtain faster relief, as this may increase the risk of side effects.
Contact your healthcare provider if your symptoms become worse or do not begin to improve after a few days.
Temporary Blurred Vision
Alrex may cause temporary blurred vision immediately after the drops are applied.
Wait until your vision becomes clear before driving, operating machinery, or performing activities that require clear eyesight.
Persistent or worsening blurred vision should be reported to your healthcare provider.
Possible Eye Pressure Changes
Corticosteroid eye drops can increase pressure inside the eye in some people.
High eye pressure may not cause obvious symptoms, but it can damage the optic nerve if it remains untreated. The risk generally increases when corticosteroid eye drops are used for longer periods.
Your healthcare provider may check your eye pressure if treatment continues for 10 days or longer.
Risk of Cataracts
Long-term corticosteroid use may increase the risk of developing a type of cataract that causes the natural lens of the eye to become cloudy.
Possible symptoms include:
- Blurred or cloudy vision
- Increased glare
- Halos around lights
- Difficulty seeing at night
- Faded colors
This risk is mainly associated with prolonged use. Use Alrex only for the length of time prescribed.
Risk of Eye Infection
Corticosteroids reduce inflammation by lowering the local immune response. This may make it harder for the eye to fight certain infections or may hide signs that an infection is becoming worse.
Alrex should not be used for certain viral, fungal, or mycobacterial eye infections. These include some infections caused by the herpes simplex virus.
Contact your healthcare provider if you develop:
- Increasing eye pain
- Thick discharge
- Severe redness
- Swelling around the eye
- Sudden sensitivity to light
- Reduced vision
- Symptoms that worsen during treatment
Eye Injuries and Surgery
Corticosteroid eye drops may delay healing after an eye injury or surgery.
Tell your healthcare provider if you recently had eye surgery, injured your eye, or have a condition that causes thinning of the cornea or the white outer layer of the eye.
Do not use Alrex on an injured eye unless it has been prescribed specifically for that situation.
Use With Contact Lenses
Contact lenses should generally not be worn when the eyes are red, inflamed, or irritated.
Some Alrex formulations contain a preservative that can be absorbed by soft contact lenses. Remove your lenses before applying the drops and follow your healthcare provider’s instructions about when they may be put back in.
Role in an Allergy Treatment Plan
Alrex may be one part of a complete eye allergy treatment plan.
Other measures may include:
- Avoiding or limiting exposure to known allergens
- Keeping windows closed when pollen levels are high
- Washing the face and eyelids after outdoor exposure
- Using cool compresses over closed eyes
- Avoiding rubbing the eyes
- Using artificial tears to rinse allergens from the eyes
- Taking other allergy medicines as directed
Do not combine Alrex with another medicated eye drop unless your healthcare provider confirms that the combination is appropriate.
Regular Medical Monitoring
Alrex provides temporary relief but does not cure seasonal allergies.
Regular follow-up may be needed to check:
- Eye pressure
- Changes in vision
- Signs of infection
- Corneal healing
- Response to treatment
- Whether continued corticosteroid treatment is necessary
Use Alrex exactly as prescribed and do not stop or extend treatment without speaking with your healthcare provider.
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